When I was little I thought that all you had to do to time travel into the future was to run really fast in a straight line. One day I went to my brother's track meet and asked my parents why he wasn't in the future yet, and they explained. Ha.
A childhood belief about general

others believed things like this
- When I was child I used to believe the future going to be similar like in the film Back to the future part 2 — Frankie
- I used to believe that the cars of the future could fly.Anon
- I used to believe that the hoverboards in Back to the Future 2 were real.— Negman
- When I was 6 I used to believe my parents were watching me at school on TV. It explained a lot at the time!— opinionata
- I used to think that the line in the song "Life in the Fast Lane" was "Fights in the Bat Plane".Anon
- I once believed that one could run around the south pole in order to travel backwards and forwards in time.— kaibutsu