Rocket Toys? Who doesn’t like rockets?! Remember that hydrogen experiment in high school? I found rocket toys that use hydrogen for fuel. You even make your own fuel from tap water by electrolysis. Join the green revolution while playing with rocket toys, how cool is that? You can use electricity to split water into hydrogen and oxygen. Then all it takes is a spark and it quickly re-combines into water, plus a lot of energy. The rocket comes with a tutorial that explains the process if you are interested in more details. I think, though, that it may be more of a bullet that a rocket, firing off with one bang instead of burning the hydrogen in an engine chamber. Still pretty cool I think, rocket toys that use hydrogen fuel that you make yourself.