Sunnytech Hot Air Stirling Engine Motor Model Kit - Educational DIY Steam Heat Science Toy for Kids & Adults - Perfect for STEM Learning, Physics Experiments & Home Decoration

Product Description .aplus-v2 { display: block; margin-left: auto; margin-right: auto; } .aplus-v2 .aplus-3p-fixed-width { width: 970px; } .aplus-v2 .aplus-3p-fixed-width.aplus-module-wrapper { margin-left: auto; margin-right: auto; } .aplus-v2 .launchpad-module { max-width: 1000px; margin-left: auto; margin-right: auto; padding-top: 15px; padding-bottom: 15px; } .aplus-v2 .launchpad-text-container { margin-left: auto; margin-right: auto; text-align: justify; -moz-text-align-last: center; text-align-last: center; } .aplus-v2 .launchpad-text-center { text-align: center; } .aplus-v2 .launchpad-text-left-justify { text-align: justify; -moz-text-align-last: left; text-align-last: left; } html[dir='rtl'] .aplus-v2 .launchpad-text-left-justify { text-align: justify; -moz-text-align-last: right; text-align-last: right; } .aplus-v2 .launchpad-video-container { width: 100%; } .aplus-v2 .launchpad-module-video .aplusAiryVideoPlayer { margin-left: auto; margin-right: auto; padding-bottom: 25px; } .aplus-v2 .launchpad-module-three-stack .launchpad-module-stackable-column { display: inline-block; width: 32%; vertical-align: top; padding-left: 10px; padding-right: 10px; } .aplus-v2 .launchpad-module-three-stack .launchpad-module-three-stack-container { display: table; text-align: center; margin-left: auto; margin-right: auto; } .aplus-v2 .launchpad-module-three-stack .launchpad-module-three-stack-container img { max-width: none; } .aplus-v2 .launchpad-module-three-stack .launchpad-module-three-stack-block { margin-bottom: 14px; } .aplus-v2 .launchpad-module-three-stack .launchpad-module-three-stack-detail { display: table-caption; caption-side: bottom; } .aplus-v2 .launchpad-column-container { vertical-align: middle; } .aplus-v2 .launchpad-column-image-container { width: 34.5%; } .aplus-v2 .launchpad-column-text-container { width: 64.5%; padding: 0 150px; } .aplus-v2 .launchpad-module-left-image .launchpad-column-text-container { padding-right: 0; } .aplus-v2 .launchpad-module-right-image .launchpad-column-text-container { padding-left: 0; } .aplus-v2 .launchpad-about-the-startup h5 { font-weight: normal; font-style: italic; } .aplus-v2 .launchpad-faq h2 { color: #ffa500; } .aplus-v2 .launchpad-module-person-block { margin-bottom: 10px; } .aplus-v2 { display:block; margin-left:auto; margin-right:auto; word-wrap: break-word; overflow-wrap: break-word; word-break: break-word; } /* Undo this for tech-specs because it breaks table layout */ .aplus-v2 .aplus-standard .aplus-tech-spec-table { word-break: initial; } .aplus-v2 .aplus-standard .aplus-module-wrapper {text-align:inherit; display:block; margin-right:auto;margin-left:auto;} .aplus-v2 .aplus-standard.aplus-module.module-1, .aplus-v2 .aplus-standard.aplus-module.module-2, .aplus-v2 .aplus-standard.aplus-module.module-3, .aplus-v2 .aplus-standard.aplus-module.module-4, .aplus-v2 .aplus-standard.aplus-module.module-6, .aplus-v2 .aplus-standard.aplus-module.module-7, .aplus-v2 .aplus-standard.aplus-module.module-8, .aplus-v2 .aplus-standard.aplus-module.module-9, .aplus-v2 .aplus-standard.aplus-module.module-10, .aplus-v2 .aplus-standard.aplus-module.module-11, .aplus-v2 .aplus-standard.aplus-module.module-12{padding-bottom:12px; margin-bottom:12px;} .aplus-v2 .aplus-standard.aplus-module:last-child{border-bottom:none} .aplus-v2 .aplus-standard.aplus-module {min-width:979px;} /* aplus css needed to override aui on the detail page */ .aplus-v2 .aplus-standard.aplus-module table.aplus-chart.a-bordered.a-vertical-stripes {border:none;} .aplus-v2 .aplus-standard.aplus-module table.aplus-chart.a-bordered.a-vertical-stripes td {background:none;} .aplus-v2 .aplus-standard.aplus-module table.aplus-chart.a-bordered.a-vertical-stripes td.selected {background-color:#ffd;} .aplus-v2 .aplus-standard.aplus-module table.aplus-chart.a-bordered.a-vertical-stripes td:first-child {background:#f7f7f7; font-weight:bold;} .aplus-v2 .aplus-standard.aplus-module table.aplus-chart.a-bordered.a-vertical-stripes tr th {background:none; border-right:none;} .aplus-v2 .aplus-standard.aplus-module table.aplus-chart.a-bordered tr td,.aplus-v2 .aplus-standard .aplus-module table.aplus-chart.a-bordered tr th {border-bottom:1px dotted #999;} /* A+ Template - General Module CSS */ .aplus-v2 .aplus-standard .apm-top {height:100%; vertical-align:top;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-top {padding-left: 0px; padding-right: 3px} .aplus-v2 .aplus-standard .apm-center {height:100%; vertical-align:middle; text-align:center;} .aplus-v2 .aplus-standard .apm-row {width:100%; display:inline-block;} .aplus-v2 .aplus-standard .apm-wrap {width:100%;} .aplus-v2 .aplus-standard .apm-fixed-width {width:969px;} .aplus-v2 .aplus-standard .apm-floatleft {float:left;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-floatleft {float:right;} .aplus-v2 .aplus-standard .apm-floatright {float:right;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-floatright {float:left;} .aplus-v2 .aplus-standard .apm-floatnone {float:none;} .aplus-v2 .aplus-standard .apm-spacing img {border:none;} .aplus-v2 .aplus-standard .apm-leftimage {float:left; display:block; margin-right:20px; margin-bottom:10px;width: 300px;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-leftimage {float: right; margin-right: 0px; margin-left:20px;} .aplus-v2 .aplus-standard .apm-centerimage {text-align: center; width:300px; display:block; margin-bottom:10px;} .aplus-v2 .aplus-standard .apm-centerthirdcol {min-width:359px; display:block} .aplus-v2 .aplus-standard .apm-centerthirdcol ul, .aplus-v2 .aplus-standard .apm-centerthirdcol ol {margin-left: 334px;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-centerthirdcol ul, html[dir='rtl'] .aplus-v2 .aplus-standard .apm-centerthirdcol ol {margin-left: 0px; margin-right: 334px;} .aplus-v2 .aplus-standard .apm-rightthirdcol {float:right; width:230px; padding-left:30px; margin-left:30px; border-left:1px solid #dddddd;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-rightthirdcol {float: left; padding-left: 0px; padding-right:30px; margin-left:0px; margin-right:30px; border-left:0px; border-right:1px solid #dddddd;} .aplus-v2 .aplus-standard .apm-lefttwothirdswrap {width:709px; display:block;} .aplus-v2 .aplus-standard .apm-lefthalfcol {width:480px; padding-right:30px; display:block; float:left;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-lefthalfcol {padding-left:30px; float:right;} .aplus-v2 .aplus-standard .apm-righthalfcol {width:480px; display:block; float:left;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-righthalfcol {float:right;} .aplus-v2 .aplus-standard .apm-eventhirdcol {width:300px; display:block;} .aplus-v2 .aplus-standard .apm-eventhirdcol-table {border-spacing: 0px 0px; border-collapse: collapse;} .aplus-v2 .aplus-standard .apm-eventhirdcol-table tr td {vertical-align: top;} .aplus-v2 .aplus-standard .apm-fourthcol {width:220px; float:left;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-fourthcol {float:right;} .aplus-v2 .aplus-standard .apm-fourthcol .apm-fourthcol-image {position:relative;} .aplus-v2 .aplus-standard .apm-fourthcol img {display:block; margin:0 auto;} .aplus-v2 .aplus-standard .apm-fourthcol-table {border-spacing: 0px 0px; border-collapse: collapse;} .aplus-v2 .aplus-standard .apm-fourthcol-table tr td {vertical-align: top;} .aplus-v2 .aplus-standard .apm-listbox {width:100%;} .aplus-v2 .aplus-standard .apm-iconheader {float:left; padding-left:10px;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-iconheader {float:right; padding-left:0px; padding-right: 10px} .aplus-v2 .aplus-standard .apm-spacing ul:last-child,.aplus-v2 .aplus-standard ol:last-child {margin-bottom:0 !important;} .aplus-v2 .aplus-standard .apm-spacing ul,.aplus-v2 .aplus-standard ol {padding:0 !important;} .aplus-v2 .aplus-standard .apm-spacing ul {margin:0 0 18px 18px !important;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-spacing ul {margin:0 18px 18px 0 !important;} .aplus-v2 .aplus-standard .apm-spacing ul li,.aplus-v2 .aplus-standard ol li {word-wrap:break-word; margin:0 !important;} .aplus-v2 .aplus-standard .apm-spacing ul li {margin:0 !important;} /* A+ Template - Module 1 Sepcific CSS */ .aplus-v2 .aplus-standard .amp-centerthirdcol-listbox {display:inline-block; width:359px;} /* A+ Template - Module 2/3 Specific CSS */ .aplus-v2 .aplus-standard .apm-sidemodule {text-align:left; margin:0 auto; width:970px; padding:0; background-color:#ffffff; position:relative;} .aplus-v2 .aplus-standard .apm-sidemodule {text-align:inherit;} .aplus-v2 .aplus-standard .apm-sidemodule-textright {position:relative; display:table-cell; vertical-align:middle; padding-left:40px; height:300px; max-height:300px;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-sidemodule-textright {padding-left:0px; padding-right: 40px;} .aplus-v2 .aplus-standard .apm-sidemodule-textleft {position:relative; display:table-cell; vertical-align:middle; height:300px; max-height:300px;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-sidemodule-textleft {padding-left:0px;} .aplus-v2 .aplus-standard .apm-sidemodule-imageleft {position:relative; float:left; display:block;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-sidemodule-imageleft {float:right;} .aplus-v2 .aplus-standard .apm-sidemodule-imageright {position:relative; float:right; display:block;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-sidemodule-imageright {float:left;} /* A+ Template - Module 4 Specific CSS */ .aplus-v2 .aplus-standard.aplus-module.module-4 th {padding: 0px; padding-right:30px; width:220px;} html[dir='rtl'] .aplus-v2 .aplus-standard.aplus-module.module-4 th {padding-left: 30px; padding-right: 0px;} .aplus-v2 .aplus-standard.aplus-module.module-4 th:last-of-type {padding-right:0px;} html[dir='rtl'] .aplus-v2 .aplus-standard.aplus-module.module-4 th:last-of-type {padding-left: 0px} /* A+ Template - Module 5 Specific CSS */ .aplus-v2 .aplus-standard .apm-tablemodule {text-align:left; margin:0 auto; width:970px; display:table;} .aplus-v2 .aplus-standard table.apm-tablemodule-table {border-bottom:1px solid #dddddd; width: 970px; left:4%;table-layout: fixed} .aplus-v2 .aplus-standard th.apm-tablemodule-keyhead {border-top:1px solid #dddddd; padding:8px 14px 6px !important; background-color:#f7f7f7; font-weight:normal; color:#626262; float:none !important; margin-right:0; text-align:center; width:106px;} .aplus-v2 .aplus-standard tr.apm-tablemodule-keyvalue td {padding-top:8px !important; padding-left:14px; padding-bottom:8px; border-top:1px solid #dddddd; border-bottom:1px solid #dddddd; text-align:center;width:inherit!important} .aplus-v2 .aplus-standard .apm-tablemodule-valuecell.selected {background-color:#fff5ec;} .aplus-v2 .aplus-standard .apm-tablemodule-valuecell span {word-wrap:break-word;} .aplus-v2 .aplus-standard .apm-tablemodule-keyhead {border-right:1px solid #dddddd;} .aplus-v2 .aplus-standard .apm-tablemodule-blankkeyhead {border:0 !important; width:18%;} .aplus-v2 .aplus-standard .apm-tablemodule-image {background-color:#FFFFFF; padding:0 !important; text-align:center; overflow:hidden; vertical-align:bottom;} .aplus-v2 .aplus-standard .apm-tablemodule-imagerows > td > img {max-width:none !important;} .aplus-v2 .aplus-standard table.apm-tablemodule-table {margin-bottom: 6px!important;} .aplus-v2 .aplus-standard table.apm-tablemodule-table th {padding-bottom:8px; text-align:center;} .aplus-v2 .aplus-standard .apm-checked {text-align:center;} /* A+ Template - Module 6 Specific CSS */ .aplus-v2 .aplus-standard .apm-hovermodule {text-align:left; margin:0 auto; width:970px; padding: 0; background-color:#ffffff; position:relative;} .aplus-v2 .aplus-standard .apm-hovermodule {text-align:inherit;} .aplus-v2 .aplus-standard .apm-hovermodule-slides {background-color:#ffffff; width:970px; height:300px;} .aplus-v2 .aplus-standard .apm-hovermodule-slides-inner {margin-left:345px; position:absolute; z-index:25;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-hovermodule-slides-inner {margin-left:0px; margin-right:345px;} .aplus-v2 .aplus-standard .apm-hovermodule-slidecontrol {padding-top: 14px;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-hovermodule-slidecontrol {left: 0px; right:345px;} .aplus-v2 .aplus-standard .apm-hovermodule-smallimage {vertical-align:top; display: inline-block; width:80px; cursor:pointer; margin-right:35px; padding:0;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-hovermodule-smallimage {margin-right:0px; margin-left:35px;} .aplus-v2 .aplus-standard .apm-hovermodule-smallimage-bg {background-color:#ffffff; width:80px; height:80px;} .aplus-v2 .aplus-standard .apm-hovermodule-smallimage-last {margin-right:0 !important;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-hovermodule-smallimage-last {margin-left:0 !important;} .aplus-v2 .aplus-standard .apm-hovermodule-smallimage a {text-transform:uppercase; font-size:11px; font-weight:bold;} .aplus-v2 .aplus-standard .apm-hovermodule-smallimage a:hover {text-decoration:none; color:#333333 !important;} .aplus-v2 .aplus-standard .apm-hovermodule-smallimage img {border:1px solid #888888;} .aplus-v2 .aplus-standard .apm-hovermodule-opacitymodon:hover {opacity:1 !important; filter:alpha(opacity=100) !important;} .aplus-v2 .aplus-standard .apm-hovermodule-opacitymodon img {opacity:0.3; filter:alpha(opacity=30);} .aplus-v2 .aplus-standard .apm-hovermodule-image {position:absolute; left:0; z-index: 1;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-hovermodule-image {right:0;} /* A+ Template - Module 9 Specific CSS */ .aplus-v2 .aplus-standard.aplus-module.module-9 th.apm-center {padding: 0 35px 0 0; width:300px;} html[dir='rtl'] .aplus-v2 .aplus-standard.aplus-module.module-9 th.apm-center {padding: 0 0 0 35px; width:300px;} .aplus-v2 .aplus-standard.aplus-module.module-9 th.apm-center:last-of-type {padding:0px;} /*A+ Template - Module 11/12 Specific CSS */ .aplus-v2 .aplus-standard .apm-heromodule-textright {align-self:center; right:50px; margin-left:auto; padding:15px; filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#BBBBBB,endColorstr=#FFFFFF); background-color: rgb(0,0,0); background-color:rgba(0,0,0,0.7);color:white; width:250px;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-heromodule-textright {left: 50px; right:auto; margin-left:0; margin-right:auto;} .aplus-v2 .aplus-standard .apm-heromodule-textright h3, .aplus-v2 .aplus-standard .apm-heromodule-textright ul, .aplus-v2 .aplus-standard .apm-heromodule-textright ol, .aplus-v2 .aplus-standard .apm-heromodule-textright ul .a-list-item, .aplus-v2 .aplus-standard .apm-heromodule-textright ol .a-list-item {color:white} .aplus-v2 .aplus-standard.module-12 .textright {align-self:center; right:50px; margin-left:auto; padding:15px; color:black; width:250px; filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#BBBBBB,endColorstr=#FFFFFF); background-color: rgb(255,255,255); background-color:rgba(255,255,255,0.7);} html[dir='rtl'] .aplus-v2 .aplus-standard.module-12 .textright {left: 50px; right:auto; margin-left:0; margin-right:auto;} .aplus-v2 .aplus-standard.module-12 .apm-hero-image,.aplus-v2 .aplus-standard.module-11 .apm-hero-image{float:none} .aplus-v2 .aplus-standard.module-12 .apm-hero-image img,.aplus-v2 .aplus-standard.module-11 .apm-hero-image img{position:absolute} .aplus-v2 .aplus-standard.module-12 .apm-hero-text,.aplus-v2 .aplus-standard.module-11 .apm-hero-text{position:relative} .aplus-v2 .aplus-standard.module-11 .aplus-module-content,.aplus-v2 .aplus-standard.module-12 .aplus-module-content{min-height:300px; display: flex} /* module 13 text */ .aplus-v2 .aplus-standard .aplus-module-13 { padding: 40px 0; max-width: 979px; } .aplus-v2 .aplus-standard .aplus-module-13 .aplus-13-heading-text { padding-bottom: 10px; } .aplus-v2 .aplus-standard .aplus-module-13 p { text-align: left; padding-bottom: 10px; } .aplus-v2 .aplus-standard .aplus-module-13 p { text-align: inherit; } @media (max-width: 800px) { /* Main Media Queries */ .aplus-v2 .aplus-standard .acs-ux-wrapfix {width:100%;} .aplus-v2 .aplus-standard .aplus-module-wrapper {width:100%;} .aplus-v2 .aplus-standard .apm-leftimage {float:none;} html[dir='rtl'] .aplus-v2 .aplus-standard .acs-ux-wrapfix {width:100%;} html[dir='rtl'] .aplus-v2 .aplus-standard .aplus-module-wrapper {width:100%;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-leftimage {float:none;} .aplus-v2 .aplus-standard .apm-centerthirdcol ul, .aplus-v2 .aplus-standard .apm-centerthirdcol ol {margin-left: 14px;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-centerthirdcol ul, html[dir='rtl'] .aplus-v2 .aplus-standard .apm-centerthirdcol ol {margin-left: 0px; margin-right: 14px;} /* Module1 Media Queries */ .aplus-v2 .aplus-standard .apm-lefttwothirdswrap {float:none; width:100%; margin:0;} .aplus-v2 .aplus-standard .apm-leftimage p {display:none;} .aplus-v2 .aplus-standard .apm-centerthirdcol {float:none; width:100%;} .aplus-v2 .aplus-standard .apm-listbox {width:100%;} .aplus-v2 .aplus-standard .apm-rightthirdcol {float:none; width:100%; border-left:none; padding:0; margin:0; margin-bottom:20px;} .aplus-v2 .aplus-standard .apm-rightthirdcol-inner img {display:block; margin:auto;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-lefttwothirdswrap {float:none; width:100%; margin:0;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-leftimage p {display:none;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-centerthirdcol {float:none; width:100%;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-listbox {width:100%;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-rightthirdcol {float:none; width:100%; border-left:none; padding:0; margin:0; margin-bottom:20px;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-rightthirdcol-inner img {display:block; margin:auto;} /* Module2/3 Media Queries */ .aplus-v2 .aplus-standard .apm-sidemodule {width:100%; height:auto;} .aplus-v2 .aplus-standard .apm-sidemodule-imageleft {width:100%; position:relative; display:block; margin-bottom:15px;} .aplus-v2 .aplus-standard .apm-sidemodule-imageleft img {display:block; margin:0 auto;} .aplus-v2 .aplus-standard .apm-sidemodule-imageright {width:100%; position:relative; display:block; margin-bottom:15px;} .aplus-v2 .aplus-standard .apm-sidemodule-imageright img {display:block; margin:0 auto;} .aplus-v2 .aplus-standard .apm-sidemodule .a-spacing-medium {margin-bottom:30px !important;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-sidemodule {width:100%; height:auto;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-sidemodule-imageleft {width:100%; position:relative; display:block; margin-bottom:15px;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-sidemodule-imageleft img {display:block; margin:0 auto;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-sidemodule-imageright {width:100%; position:relative; display:block; margin-bottom:15px;} html[dir='rtl'] .aplus-v2 .aplus-standard .apm-sidemodule-imageright img {display:block; 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cursor: pointer; display:none;} if(P) { P.when("a-expander", "ready").execute(function (expander) { expander.initializeExpanders(); }); } Like every good startup, Sunnytech began in a garage in New Jersey. A family company, we promise to only produce and sell products that we would be proud to use in our own homes and yards. At Sunnytech, the “triple bottom line” is alive and well. We seek to do right, do well, and do good in support of people, profits, and the planet. This means we’re striving to play an active role in the communities in which we operate. Because we believe in being outstanding stewards of our beautiful nation and planet, Sunnytech’s US-based operations abides by a 100% zero-landfill policy. All leftover materials are recycled, including electronics. It can inspire your curiosity and creativity. It is also a wonderful gift for your friends, kids and students! it's proven to be a conversation starter to impress your visitors. It’s a cool piece of art even just stands on your desk. To be admired and to be talked more from your friends if you have this magic stuff. This stirling engine designed reasonable and compact. You can bring it home, school office with convenient in your bag. FEATURES Model: M16-C1. Status: Assembled. Size: 4.64x4.64x7.87in (118x118x200mm). Material: aluminium alloy, stainless steel, brass, bamboo base. Net Weight: 1.87lb(850g). ATTENTION 1)Do not touch the baked test tube and the metal connected to it, so as not to burn. 2)Do not add any lubricant to Stirling. 3)Children should use it under supervision. 4)Please adopt 95% high-grade alcohol to be the fuel to make sure the air tank can get more temperature and drive the stirling engine. 5)Please pay attention the temperature of candle's light is not powerful enough for this toy. TIPS Spare parts offer available. Please message us to get offer if need any parts replacement. PACKING LIST Engine x1 Alcohol Lamp x1 RAPID COOLING There is a groove on the surface of Stirling, which is a water-cooled design. When it stops working, you can add cold water to make it cool quickly. You can even add crushed ice to cool it. HOW TO START? Fill the alcohol burner with your 95% alcohol (we recommend this fuel, not more than 2/3 of the container) and light it. Let the light burn the round ended cylinder for about 60-120 seconds, then give the wheel a gently push, it will run like a charm. WELL MADE 304 stainless steel heating cylinder, brass piston, bamboo base, alloy steel power cylinder, the rest are made of aluminum alloy, firm and durable, All the parts have done surface treatment to avoid rusting. Oil-free, noise-free. COLLECTION & GIFT When you don't play with it, it can be placed on your desktop or cabinet as a work of art. You can also give it as a gift to your relatives or friends. If you are a Stirling collector, it will be an indispensable collection. EDUCATIONAL It has a wide range of application as, educational for Kids' science project, physical/mechanical learning, teacher’s Demo props on the class, families, parents, kids, etc. Many of our customers come from school, colleague, etc. AMAZING CONVERSATION PIECES ON YOUR DESK It's funny to see people's looks and reactions when they squeeze a little shot for this Stirling engine. Put some combustibles and get the flywheel going, and then it works like charm. All of your guests want to know what happened, ice-breaking success. What a marvelous toy. Stirling engine is traditionally classified as an external combustion engine. Please refer to wikipedia for more information about What is the stirling engine and How it works?