I made a Hydrogen Generator that produces hydrogen gas using salt water. I collected some off the gas in a balloon and set it on fire. If you're interested in seeing that
Making a Simple Hydrogen Generator from Screw | make hho generator at home - YouTube
DIY Hydrogen Generation Technology
How to Turn Water into Fuel by Building This DIY Oxyhydrogen Generator « Mad Science :: WonderHowTo
Making Hydrogen Generator From Washers And a Water Bottle