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Pentagonal High-Tower Spring
Making a Folding Crossbow
Thanks for letting me know, I have a Macbook so I didn't know about it. I'll add that in. ;)
Processing Common Tree Foods: Acorns, Black Walnuts, Hickory Nuts, Persimmons
How to Make a Quality MemeView Instructable »
I think that you should spread this Tumbler on more sites. Like Tumblr, for example. Duh-dun-tshhhh! But joke aside, it is a very good concept. As for the motor, you could mount a fan to blow on it so it could stay running for a longer period of time.
Launch It: The Paper Catapult.
How to Write an Instructable
15-minute paper-craft sundial
Cheese Ball Machine Gun
Solar Heated Large Scale Dehydrator
Easy Homeade 6 Minute Lasting Firelighters
I agree with Scott. A more practical material would be water. The air moving over it would evaporate, cooling the air. It would be much slower, but last longer.
A Home-Built Biomass Gasifier for Producing Wood Gas
How to Wire Batteries in Series (or in Parallel)
Solar Food Dehydrator (Dryer)
turn plastic bottles into string
A Practical Zeer Pot (evaporative cooler / non-electrical refrigerator)
Modular origami balloon | made of paper | Air balloon
Sending a Weather Balloon To 95,000 Feet
Separate Hydrogen and Oxygen from Water Through Electrolysis
This is a very ingenious invention and could help many deaf people talk to people that don't understand sign language. Good job!
Desktop Gardening, Plantbot Alpha
Year-Round Indoor Salad Gardening( Stage I)
Homemade Air Freshener Gel
The Ultimate Minecraft Sword
Make laser cut bathymetric maps
5 Phenomenal Science Stunts, Done with Dry Ice
Batman Arkham Knight Utility Belt
Milkshake Straw Lightsabers
How to Make a Match Circle
Laser Cut Cryptex - Puzzle Box