<iframe width="580" height="385" src="https://www.youtube.com/embed/NvFmh8MMyfI" frameborder="0" allowfullscreen></iframe> <br>How to make an ornithopter, a rubber band type flying machine that flies by flapping its wings. This video was made possible in ... <br><a href="https://www.youtube.com/watch?v=NvFmh8MMyfI">source</a>
