My older sisters told me and my cousin when we were little that there was a monster through this door at my cousins old house. The door was on the side of the house and it had a big hole in it (the door led to the laundry room and you couldn't see through the hole). We believed it for a long time, and we even stuck grass and seeds through the hole to feed the monster. We thought the monster was nice.
A childhood belief about monsters

others believed things like this
- I thought the boogey monster was a monster that ate boogers at night in front of youAnon
- I Used To Believe The Monster Beverage/Energy Drink Was Monster Milk!— KellGirl
- My sibs and I thought that the screen door was called the "scream door" so Mom could yell at us through it. — Kyle
- I used to believe that if you dig a hole in the ground and put pepper in the hole, the ground would sneeze.— Cookie
- I thought if I left the door open too long, a dog would come from the cupboard in the washroom and eat me
Anon - Long grass with black seeds were really ant hotels, and the seeds were sleeping ants.— angelsheep