There are many things that make people laugh. It can be a joke like:
My friend thinks he is smart. He told me an onion is the only food that makes you cry, so I threw a coconut at his face.
Did I get you on that joke? No? How about this one:
I was listening to some loud music. I was about to turn it off until my neighbor threw a brick into my window so he could hear it better.
Did you laugh on that one? Laughter is a sign of joy. Everyone laughs once in a while.