You know the vans with the ladders? I used to believe that you climbed those ladders to get to the swimming pool on top of the van! The weirdest part is, just a couple of years ago I met someone else who also had this belief as a child.
A childhood belief about swimming pools

others believed things like this
- I used to think that a "pool shark" was an actual shark that lived in a swimming poolAnon
- I believed that the ladder on the back of a trailer/rv led up to a swimming pool.— marilese
- I used to believe that if you farted while swimming in the pool, it could propel you foward really fast.— Rick
- Up until I was in 3rd grade I believed my bathing cap is what kept me afloat in the swimming pool! Anon
- When I was a kid I used to think the "carpool lane" was an actual pool cars went swimming in— skeez
- when I was a child I thougt taht sea waves are the result of whales swimming— waleed bokhari