<iframe width="580" height="385" src="https://www.youtube.com/embed/qxXj2RhKjZY" frameborder="0" allowfullscreen></iframe> <br>Cardboard is a great prototyping tool--it's cheap, easily available, versatile, AND recyclable! In this video, we go over a few ... <br><a href="https://www.youtube.com/watch?v=qxXj2RhKjZY">source</a>
