Caca Pit

A pit filled with balls that toddlers shit in.

Max, I need to go to the bathroom. (Mom goes to the bathroom and comes back in horror to find out that Max is in the caca pit.)
Max, where are you?

Oh there you are!

OH FUCK! Why is there a dirty diaper with shit all over you?
Max: This is the caca pit!

Mom: Why did I have kids?