I used to believe that there is a grinder inside our stomach (with rotating blades made out of bones) which crushed the food and hence digest it. I even used to believe that when we walk or run there was some kind of a mechanism which would rotate the chopper blades faster, digesting the food quickly!
A childhood belief about eating

others believed things like this
- I used to think that the shoulder blades were actually "back breasts".— Kdees
- When we were younger my sister and I used to think that our shoulder blades were really sprouting wings.— Raven
- I always believed as a child your stomach was a big hand which squeezed your food out through your bum....— amc
- We put food in our mouths, so naturally I believed my stomach was in my head.— Timb
- I use to believe that salt would cool food down while pepper would heat your foodAnon
- I used to believe when ordering Chinese food the food and delivery man came from China— Dave