When I was about six years old I used to believe that some invisible fleas, that my cousin invented, were real and played with me.
A childhood belief about imaginary friends

others believed things like this
- I used to believe that invisible giants played with us like I played with my dolls. — Alexandria
- I used to believe that flea markets were a place people sold fleas, or the place was infested with fleas— Kelley
- That unicorns were real. They simply had invisible horns that only people with special eyes could see
— Katie - Yesterday I realised that invisible ink doesn`t make me invisible.— Jonathan Eleven years old
- I thought that some animals had just been "invented" recently (like within the last 50 years or so)— Makron
- I used to think the Flea Markets actually sold fleas...Anon