I used this to introduce high schoolers at a STEM summer camp a few years back and they loved it. There appears to be an android/iphone app as well now, but I h

I used this to introduce high schoolers at a STEM summer camp a few years back and they loved it. There appears to be an android/iphone app as well now, but I haven't personally tried it http://light-bot.com/ http://light-bot.com/