When my Dad and his brothers (my uncles) were young, my Grandfather had them convinced that by him placing their empty M&M wrappers in his shirt pocket and spinning in a circle he could magically renew them into an unopened package of candy. He masterminded this by placing an extra bag of M&M's at the time of original purchase within his pocket in advance to giving his children their candy. Furthermore, he was succesful in materializing a bag of M&M's remotely into his shirt pocket upstairs via the same method. My Dad (the oldest of his brothers) believed these tricks until he was eight.
A childhood belief about magic tricks

others believed things like this
- My Sister Once Said That Polly Pocket Was A Real Girl That Got Shrunk To Doll Size And Turned Into A Doll.— Jamie
- I thought if you took some candy and buried in the yard, you would grow a candy tree.Anon
- I thought that the barber sign meant candy because I thought it looked like a candy cane.Anon
- when i was young i believed Micheal Jackson and 'the artist formerly known as prince' were twin brothers.— tim
- I used to believe when I was young that Poland was made entirely of candy.— Jenn
- When you saw a funeral go by, you had to grab a button on your shirt.Anon