I used to believe that exercise books actually contained exercises of the keep fit variety. I must have bought four from the local shop before realising there was no mistake and they were supposed to be blank.
A childhood belief about classes

others believed things like this
- I thought that exorcise and exercise both meant the same thing— Dobby Bob
- I spent ages wondering what a bart ender was as a child without realising that it was actually bar tender.— Heather
- i beleived that when someone bought a new house, they would swap with the person they bought it from— c
- Rain contained snail eggs...mmmm— klaus
- I used to believe 'three bean salad' was an extremely small entree because it contained only three beans.— queeneve
- We were told at school by the evil dinner ladies that apple pips contained arsenic.....Anon