Beautiful Curves is a cute little drawing application, creating almost organic-looking artwork. According to its creator “Beautiful curves simulates that little bit of randomness in life, where you never know whats going to happen next.”
It’s a fun application, which would work on your interactive whiteboard.
That’s a great website — very easy to get sucked into playing around on it for a long time. There’s also a link to another drawing website, called Sketch, provided in a link on that site. I don’t know if Sketch is IWB-compatible, but that does some other really neat things (like allow you to rotate your drawing and effectively draw in another dimension). I really enjoy this blog; keep up the great work!