I believed travel trailers had a pool on top because the curved ladder was the same.
A childhood belief about buses

others believed things like this
- I believed that the ladder on the back of a trailer/rv led up to a swimming pool.— marilese
- I believed that the Kreepy Crawlie used to clean our pool, would follow me around the pool and eat me. — Mother-of-2
- I once believed that one could run around the south pole in order to travel backwards and forwards in time.— kaibutsu
- Up until I was in 3rd grade I believed my bathing cap is what kept me afloat in the swimming pool! Anon
- I used to think that the expression "The former or the latter?" was actually "The farmer or the ladder?" — Fitzwilliam
- When i was litttle i used to believe that if a had a long enough ladder a could touch the sky.— Sarah Howell