What is he doing?
He is making models.
What is she doing?
She is riding a bike/She is cycling.
What are they doing?
They are playing tennis
What is she doing?
She is doing homework
What is he doing?
He is skateboarding.
What are they doing?
They are eating lunch.
What is he doing?
He is fishing.
What is she doing?
She is sleeping.
What are they doing?
They are swimming.
What are they doing?
They are singing.
What is she doing?
She is reading a book.
What is he doing?
He is dancing.
What is she doing?
She is flying a kite.