Switching letters is called spoonerism. For example, saying "jag of Flapan", instead of "flag of Japan".
2
A singing birthday card has more computing power than the allied forces in 1945.
30
Dell's first advertisement was made on the back of a pizza box.
78
According to the FDA, it's safe to eat the stickers that are found on fruit; they're actually made out of "edible paper" and the glue is food grade.
20
The left ear is more responsive to words of love and emotion whispered into it than the right.
40