You can play on grass or on a court made of cement or clay. You hit a green ball.
Tennis
15
You have to hit a small white thing over a net. The "ball" is not a ball but something else.
Badminton
15
In this sport, one team is trying to carry an oddly shaped ball from one end of the field to the other, while the other team is trying to stop them. It's very popular in the UK and Australia.
