You know when you turn on the hot tap & the water comes out cold first, so you do a little 'come here' motion with your hand in the water to see when it is hot enough without risking burning yourself? Well it turns out my daughter (aged about 5) understandably assumed that this hand action is how you 'turn the water hot'. She explained this to me kindly and patiently when one day I ran the hot tap & complained that all the hot water had run out. I have never corrected her.
A childhood belief about bathrooms

others believed things like this
- I used to believe that if i splashed water on the wall during a bath, the water would turn into spiders— justin
- I didn't think you could put out a fire with hot water - only cold water would do.— Katti Pytt
- I used to believe that hot water was red and cold water was blue.Anon
- I used to believe that if I ate too many watermelons I would turn into water...— Peter
- I thought that hydrogen was pure water (since I knew hydro- meant water) and H2O was impure some how— Hexetic
- that bathroom tap water was recycled "potty" water from the toliet. — livingdeadgirl