A knobkerrie is like a stick that is used by people in some parts of Africa. It's kind of like a weapon or a tool that can be used for different things. It's made out of a strong material like wood, and it has a big round ball at one end that you hold onto to help you swing it.
Some people use knobkerries to hunt animals. They use the stick part to hit the animal and make it easier to catch. Other people use knobkerries to protect themselves from danger. They can use the stick to hit an attacker and defend themselves.
But some people also use knobkerries just for fun. They like to play games and compete with each other to see who can hit a target the best.
In summary, a knobkerrie is a kind of stick that has a round ball at one end that is used by people in some parts of Africa for hunting, self-defense, or fun games.