When someone asks me why I don't have kids, I'm definitely pointing them to this gallery.
Parenting is, by all accounts, an extremely difficult but rewarding job. You're responsible for these tiny humans you've created, making sure they don't die and also (hopefully) raising them to grow up to be good people. The problem is that some kids seem to actively want to thwart those goals, while others might mean well but just aren't the bright enough to be fully trusted.
If that wasn't enough, here's some kids stressing out their parents by crying for the oddest reasons