When kids are young they get the wildest ideas. They think they can fly, or that they’re a horse, or that it’s a good idea to walk the dog with roller blades on. Kids kind of think they’re invincible.

As a result, kids do some pretty dumb things. As much as you might not want to admit it. You’ve probably done dumb things too when you were young. In fact, you might have even done some of the dumb things on this list.

Bobsled down the stairs on a piece of cardboard anyone? These experiences all teach us lessons. Like not to sled down the stairs on cardboard.

Here are 40 dumb things people remember doing when they were young: