ThinkGeek - Hydrogen Fuel Rocket for Only $29.99!
 

All
you need is water and the ability to read directions, and you'll have a completely
green, Prius like, rocket that'll shoot as high as 200 feet into the air. Great
for anyone who likes to just launch things, I imagine a few of you will find
creative ways to utilize this puppy. Check it out. HYDROGEN
FUEL ROCKET DEAL