when I was about 12 I convinced my 4 year old neighbor that Kix cereal was in fact dog food. This was helped by the fact that the box had clifford the big red dog on it and the fact that she couldn't read.
A childhood belief about general

others believed things like this
- I am Catholic. I used to believe that the Father presenting the Mass was in fact God himself.— Lindsey
- I always pictured the good Samaritan as a Samurai. Still do, in fact.Anon
- i used to think that the red colourin gon Smarties was made from Beatles blood. In fact, I still do!!— pigsy
- I recently very disturbed to learn that Al Jolson was in fact Caucasian.Anon
- I used the scar on my dads leg was a shark bite when in fact he fell off his bike when he was a child— Wendy Murray
- My mum told me that cold custard (which I hated) was in fact Banana Blancmange. I lapped it up for years.— Chalky