My best friend and I both believed that we could breathe underwater. I still do actually; she's grown up... well, technically we both have but she lost her imagination. Anyway.
Whenever we would go to the beach together, or sometimes the pool, we'd practice breathing in the water... weird thing is, neither of us ever drowned or anything, we'd stay underwater for minutes at a time.
A childhood belief about special powers

others believed things like this
- i used to believe that pools had underwater doors that sharks were going to swim out of.— marky
- I used to believe eating fish enables me to live underwater and eating veggy makes me prettier!— Melody
- when i was 4 i believed i could breathe under water, one day i decided to try it and woke up in the hospital!Anon
- I used to believe that grown-ups were born "grown up" and that I would stay a little kid forever.— Still A Kid
- I used to believe that once you reached a certain age you lost your imagination— Kiwi
- i used to think that you would die if you didn't wait 30 minutes to go into the pool after eating. (^^)— cady