See Froggy World at the 2013 San Mateo Maker Faire! I've also written an app, "How To Make A Science Fair Project." I am the author of "Doable Renewables," "Haywired" and "Amazing Rubber Band Cars." I also have published articles in Popular Science, Circuit Cellar and Robotics Age. Now, check out my iPad apps: Amazing Rubber Band Cars (one chapter, free). How to Make A Science Fair Project; Phil and Freddy's Picnic (interactive picture book featuring two frogs)