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How to build a wind turbine.
Folding Geodesic Dome
Solid State Tesla Coil
Office Supplies Challenge - Liquid Fuel Rocket
Covert Altoids Dart Gun
Cloud in a Bottle
How to make a projector for your iPod/iPhone for about a $1
The Best Damn Pen Shooter Period.
Altoid Tin Alcohol Stove
How to build an Electric Guitar.
The Lucid Dream Machine
DeskTop Steam Boiler
My WristBow (homemade crossbow, wrist mounted, with laser-sight)