I used to believe that electrons orbiting around a nucleus were a small solar system, with people actually living on the electrons.
The earth was also an electron on an atom in a much larger world.
Time is also relative in all these worlds; say if I were to throw a piece of paper into a fire, the seconds that it will take the paper to fall into the fire are like eons to the inhabitants of the small universe on the paper. Likewise, if someone in the large world tosses the paper we are an atom on into their fire, what seems like a couple seconds in their world will be centuries in ours. So.... suppose the giants have already tossed our piece of paper towards the fire....?
A childhood belief about physics

others believed things like this
- when I was small I always thought that the solar system ended, and then it was just white paper after that— sparrow
- I used to believe fax machines instantly teleported a piece of paper to who ever you wanted. Anon
- i always thought it was Grape Balls of Fire instead of Great Balls of Fire— Courtney
- I used to believe that house fires were caused by foolish people who put paper on the stove.— C.C.
- I used to believe that coin change could turn into actual paper money if you left it alone for a long time. — Marcus O
- I used to think that when you sent a fax, the paper went through the wires.— em