YouTube user GatheringSticks built a functional single-shot 12 gauge shotgun using some pipe, a staple gun, a piece of a Croc, a gate lock, and a sharpened drill bit as the firing pin.
This is a fully functional inexpensive homemade 12ga. shotgun. Made from a stapler, some pipe and few other odds and ends.
Vision and the way our brains perceive what we are seeing are incredible. Just think of optical illusions, 3D images, the fact that your eyes are processing the world around you upside-down! A fun trick to play on your eyes and brain uses a zoetrope. This fantastic tool is able to change multiple still images, into a moving animation that would make Walt Disney jealous.
You can download the Zoetrope template here
Terry Moore demonstrates a simple way to tie your shoes better. In this video he explains that after you make the initial knot and the first bow like you usually would, all you have to do is loop the lace the other way around the bow. Finish the knot and pull tight.
Terry Moore found out he’d been tying his shoes the wrong way his whole life. In the spirit of TED, he takes the stage to share a better way. (Historical note: This was the very first 3-minute audience talk given from the TED stage, in 2005.)