When I was about 5 or 6, my older brother used to tell me all the time that he was really an alien, and that his real parents were going to come to take him home some day. He used to promise me that if I did what he asked me to do, he would put a good word in with his alien parents, and that maybe they would allow me to go back to their planet to visit. And if I didn't do what my big brother wanted, he would tell his parents how mean I was, and have them desolve me into a puddle of slime with their lazor guns.
Aren't big brothers great? <choke>
I'm still waiting for them to come take him away.
A childhood belief about aliens

others believed things like this
- I got given a box of slime marked "alien puke" and asked if E.T. was all right.Anon
- I thought the ball-headed person in the Bic logo was an alien and communicated using alien-like noises.Anon
- When I was little I used to believe that God looked like the Great Gazoo (the alien from "The Flintstones").— Susan
- I used to think that my cat was an alien that had come to teach me how to be good!— laz
- I used to believe my parents were brother and sister, and that everybody's parents were brother and sister.— Rachael
- Oh oh, I'm an alien, I'm a little alien...
Legal maybe?— Marina