Unfortunately kids' furniture isn't kid proof—then again, what is?
It was probably only minutes after the first bed was invented that it was jumped on. The day after my niece had spent the night, we noticed the mattress was sagging on our daughter's bed. Since they always do things together, we're sure both girls are to blame.
Since I had assembled the bed myself a year and a half earlier, I figured it was up to me to fix it. So I took the mattress off and inspected the damage. I was expecting the slats to be out of place or even broken. Sure enough, they were out of place.