Ok, I hope this makes sense...
When I was five, I had one of those sticker books where each page had a black-and-white picture, and a few "dotted outlines." The book came with a page of stickers that you tore out, and stuck the appropriate ones on each page.
I had one from the Disney Peter Pan movie, and one page required two stickers on top of each other. The picture was of Wendy and the boys being captured and tied up to the mast on Captain Hook's ship. In one spot, first you stuck on one sticker of the three kids, and then the "tied rope" sticker on top of the first sticker so it looked like they had the rope around them.
So that the picture looked right, the outline of the "kids" sticker had the words "put this piece down first" written on it. But I didn't understand this. I thought you had to put that sticker on first; otherwise Captain Hook would come out of the picture and kill you. Seriously!
I worried for ages whether I wanted to risk it or not. My dad even asked if I was okay. Finally I decided I'd better not. I put the book away just in case I made a mistake and unleashed Captain Hook on the world.
I don't know why they didn't just make one sticker of the kids with the rope around them and leave it at that.....
A childhood belief about toys

others believed things like this
- That captain hook lived in my closet on the very top shelf.Anon
- I used to believe that every person in the world had their own Wikipedia page about their lifeAnon
- I used to believe that God looked exactly like the picture of Abraham Lincoln on an American penny.— Leah
- I used to think God was Captain Planet.Anon
- I used to believe that the Captain's Log in Star Trek, was really a log— Anna
- When I was a kid I thought that when my parents were kids, the world was black and white and had no color...— KKM