My mother always used to say that my food when down the wrong "pipe hole" when I choked a bit on water or food. I seriously though I had pipes and water went down one and food went down the other. I thought Alzheimers was Old Timers.
I thought of two more... I always thought that the world moved under my feet and I never actually changed locations. I also that parents were given a checklist of traits they wanted for their children. But you could only choose X amount of good qualities. It was necessary to choose what they thought the best characteristics of a child would be. My mother also told me that when I went to kindergarten I would learn to read. I came home crying the first day because they didn't teach me. I believed a "swamp auger" lived under the bridge near our house and that is why you never walked over it alone.
not very creative, but i thought you'd find a pot of gold at the end of a rainbow. once when i was 9 i hiked at least 5 miles, chasing a rainbow, looking for a pot of gold... i really thought i'd find one. i was so disappointed.
I thought I could make objects move with my mind, and I tried to focus on certain objects for several minutes (Too much starwars) I believed that if I can flap my arms very fast I can really fly! And also I thought women got pregnant by kissing men.
I never knew that my parents put on the turn signals. I always thought you had to go the way the turn signals told you to. Somehow, the cars always knew where we were going.
When I was about 7, my grandmother was hit by a car. My mother out of hysteria said something along the lines of, "Grandma was made flat =(" and when I went to see my grandmother in the hospital, I expected her to be flat and was a little disappointed to see that she wasn't.