04:00
3D Printed Key
06:56
Cook with the Sun - Fresnel Lens
00:42
Bubble Machine
14:03
Steam Turbine Fan made from Aluminum Cans
04:45
Homemade Steamboat
02:30
Concentrate Alcohol using Salt
01:15
Burning Magnesium Metal
02:35
How to make a Microphone
04:57
Homemade Radio
03:00
Homemade Diode
02:54
Homemade Speaker
05:11
How to make a Homemade Speaker
02:58
How to make a Battery with Pennies
03:00
Magnet Fishing