<iframe width="580" height="385" src="https://www.youtube.com/embed/oVsFdAnIftg" frameborder="0" allowfullscreen></iframe> <br>What's the Challenge? Create some art with shadows. What Materials Do I Need? Try this project on a sunny day. You'll need: ... <br><a href="https://www.youtube.com/watch?v=oVsFdAnIftg">source</a>
