What are they doing?
They're playing tennis.
What is the boy doing?
He's kicking the ball.
What sport is it?
basketball
What's the girl doing?
She's throwing the ball.
What's she doing?
She's catching the ball.
What sport is it?
volleyball
What are they doing?
They're playing football/ soccer.
What's he doing?
He's hitting the ball.
What sport is it?
badminton
What sport is it?
baseball