Holey Plugs, Batman! But... what are they for?
25:48
Perhaps the weakest link in the US electrical system
24:55
Why don't Americans use electric kettles?
34:07
Making A Twin Cylinder Engine For My R/C Airplane
24:56
There are two types of smoke alarm. One of 'em ain't so good.
19:48
Why Are Cooling Towers Shaped Like That?
48:25
I messed up. You're using too much detergent.
29:42
Making pop rocks from scratch (is complicated)
20:50