My mom got sick of putting the tails back in my "My Little Ponies" so when I asked her for the tenth time that day to fix it, (they were always getting pulled out when I brushed them) she told me that every time you pulled the tail out it grew a little more and that if it got too long they would get caught around their necks while they slept and possibly strangle them. My ponies had messy tails after that. Looking back it seems evil to tell your child that, but NOW being a Mom to 4 kids I can understand why she said it!
A childhood belief about toys

others believed things like this
- I thought a Monkey was just a baby Gorilla and when they grew up their Tails fell off!— Brainhead
- I used to think that ponies were young horses. I was embarrasingly old when I discovered the truth.— Al's view of the world
- That hot dogs were made from rat tails.Anon
- I used to believe that my grandpa had a special power that made him fart each time I pulled his finger. — confused
- When i was little, i thought dogs poop from their tails.Anon
- When I was little, I used to believe that wind was caused by whales flapping their tails way out in the ocean.— Nanohawk