When I was super duper young, I thought that the whole world was black and white, because of black and white televisions! Oh my gawsh, that sounds silly to say. xD
When ever I had a cold or a virus I thought that the germs were fighting with armies inside my stomach and there would be planes shooting eachother and tanks firing at germ soldiers. It was kind of cool to think about.
Lol let's think of something better. I thought that my parents could afford anything, because they gave me all my money and my sister money and therefore were the source of all money.
I used to believe that my father was a killer because he had a gun inside his closet. Years later, I discovered it was a pellet gun.
When I was 8, when everything was dark in the house and I wanted to puck up something at the kitchen, I used to go there like I was holding an imaginary gun that could kill any imaginary monster or thief that I "see". I was so silly :O