Another Paper Klein Bottle
6:06
Your Klein Bottle is in the Post - Numberphile
16:24
Paper Klein Bottle 3D
7:22
Quick, very strong button attachment.
7:02
7 Amazing Science Gadgets!
3:13
What does the 4D Klein Bottle look like ? [4D Toys]
27:55
I built an Omni-Directional Ball-Wheeled Bike
7:50
Can Tim Cut It?
38:54