When I was about eight, I saw scientists on a TV news show talking about how dinosaurs had evolved into smaller animals. Somehow I missed the part about which animals (birds and whatnot) and I believed for a considerable amount of time that dinosaurs has shrunken down to insect size and lived underground. So I would dig for them under this big pine tree in my yard.
A childhood belief about general

others believed things like this
- .. the knots in wood would turn into dinosaurs. I was petrified of pine cladding.Anon
- I believed you had to color all the dinosaurs in coloring books green because all the dinosaurs WERE green.— Betty
- I sused to believe dinosaurs lived in my walls.— Joshua
- i used to believe i could go back in time so i could see dinosaurs.Anon
- I'm deaf in one ear. Until I was 7 I believed that if I didn't sleep on my good ear, dinosaurs would eat me.Anon
- I believed dinosaurs made the mountains whenever they walked the earth.— Tammy