3DRacers Editor Widget

Include this snippet in your page:

<a href="http://www.3dracers.com" class="_widget_3dracers" data-type="editor">3DRacers: Design, 3D Print and Race with bluetooth enabled mini cars!</a>
<script type="text/javascript">(function(d, s, id) {
    var js, fjs = d.getElementsByTagName(s)[0];
    if (d.getElementById(id)) return;
    js = d.createElement(s); js.id = id;
    js.src = "//www.3dracers.com/editor/widget.js";
    fjs.parentNode.insertBefore(js, fjs);
    }(document, 'script', '3dracers_com_sdk'));
</script>

Responsive embed

You can use the data-class attribute to specify a CSS class for the Iframe element added by the widget.
For example with Bootstrap use data-class="embed-responsive-item" and add a parent div:

<div class="embed-responsive embed-responsive-4by3">
<a href="http://www.3dracers.com" class="_widget_3dracers" data-type="editor" data-class="embed-responsive-item">3DRacers: Design, 3D Print and Race with bluetooth enabled mini cars!</a>
</div>
<script type="text/javascript">(function(d, s, id) {
    var js, fjs = d.getElementsByTagName(s)[0];
    if (d.getElementById(id)) return;
    js = d.createElement(s); js.id = id;
    js.src = "//www.3dracers.com/editor/widget.js";
    fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', '3dracers_com_sdk'));
</script>