this would be a rather poetic way of saying: "A child's mess awaits an adult to clean it" Hope it helped ( :

It means a child makes a mess, and then won't clean it up until his/her parents makes them, or until the parents clean it up themselves. This is probably referring to the fact that children generally don't take responsibility (unless they are taught to).

You'll understand this when you have children of your own. But, Logan is right.