I believed Smarties made you smarter. Or standing underneath or by anything that advertised smarties made you smart
A childhood belief about sweeties

others believed things like this
- i used to think that the red colourin gon Smarties was made from Beatles blood. In fact, I still do!!— pigsy
- I used to honestly think that Smarties were medicine.Anon
- Dark brown Smarties were poisonous.Anon
- when i was a child i used to think that my belly button was for storing smarties— GemSue
- I thought that smart people never made mistakes!— eeeeeeeeeeeeegggggg
- I used to think that I was smarter than adults. Now I know kids are smarter than adults in many ways— Marshall M