So what do your kids do for fun?
Apparently my 8 yo likes to plug the bathroom sink and fill it with water.
Then for a really good time, he plugs the overflow drain so he can fill it as high as possible.
Why? Just because.
Apparently my 5 yo finds it much more fun to turn the water back on and just let it keep running... and running... and running.
Why? "It's fun."