Is she flying a kite?
Yes, she is.
Is he playing with a teddy bear?
Yes, he is.
What's he doing?
He's playing with a train.
What's she doing?
She's playing with a teddy bear.
What's she doing?
She's playing with a kitten.
Is he riding a bike?
Yes, he is.
Is he playing with a kitten?
No, he isn't. He's playing with a car.
Is he riding a bike?
No, he isn't.