I used to believe that the capital letter "E" could have as many lines as you could fit in it, not just the three.
A childhood belief about spelling

others believed things like this
- I used to believe that Paris was the capital of London and Italy was the capital of France.Anon
- I just to think that Norway was the capital of the world— Elin Norway
- I used to believe that Mexico was the capital of Spain— Cadence
- When I was little, I thought that Amsterdam was the world capital of hamsters!— CountryWay
- I was sure that Adelaide (where I lived) was the capital of Australia because they both started with
"A"— fiona - I used to believe that the lines on roads were for motorcycles to drive on.— Downes