How to Build a Plastic Hydrogen Bomb

It sounds like the perfect terrorist weapon, but it is a toy that teaches the principles of electrochemistry. It's also a high-tech squirt gun. The Plastic Hydrogen Bomb uses electricity to break apart water molecules into hydrogen and oxygen. Then it uses a spark of electricity to explosively recombine the gases into high pressure steam, which propels a stream of water high into the air. The construction is a little more difficult than the other toys in this book, but the skills learned by building this toy can be put to good use building many other devices and works of art.