What goes around the world but stays in the corner?
Give me food, and I will live. Give me water and I will die. What am I?
The man who invented it doesn't want it. The man who bought it doesn't need it. The man who needs it doesn't know it. What is it?
What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?