An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
There are only 14 blimps in the world.
69
Jumbo jets use 4,000 gallons of fuel to take off.
19
To have your picture taken by the very first camera you would have had to sit still for 8 hours!
308
The life boat was patented in 1845!
29
Henry Ford produced the model T only in black because the black paint available at the time was the fastest to dry.
33
The first alarm clock could only ring at 4 a.m.
120