Someone else had a VERY similar belief.
My favourite book series of all time is Animorphs. In the first book, five kids go through an abbandonned construction site and encounter an alien called an Andalite who gives them the power to become any animal they touch.
Me and a friend thought that we could do that if we believe Animorphs was real. We tried to "Aquire" the DNA of different animals and then morph into them.
When that did'nt work, we thoguth we had to find an abbandoned constuction site and go there in the middle of the night to come in contact with the "Andalite".
Also, in the book series, there were evil aliens called yeerks that took over people's bodies. Every time someone acter weird, we thought they were being controlled by yeerks.
One more thing, we were afraid to squash bugs, because we thought they were animorphs.
A childhood belief about special powers

others believed things like this
- On this site when people sign "Anon" I thought Anon was one person who believed in a lot of weird things...— Slow to catch on.
- i thought that we were just a big story book that ended when we died— samantha
- When I was a child I used to believe that movies and series were real.Anon
- I thought Kaa's name from The Jungle Book was spelled "Car" and that he had a brother named Truck.Anon
- I used to believe if you read a book in the dark, you would go blind.— Ellen
- I believed the book Babar was how my name was spelled.— Barbara