What's she doing?
reading
What is this person doing?
drawing
What's this person doing?
skiing
What's he doing?
skateboarding
What's he doing?
playing golf
What's she doing?
watching birds / bird watching
What are they doing?
playing board games
What are they doing?
watching TV
What's this girl doing?
playing the piano
What's she doing?
running
What are they doing?
playing cards
What's he doing?
taking photos
What sport is he playing?
basketball
What is this person doing?
solving a puzzle / doing a jigsaw (puzzle)
What are they doing?
playing ice hockey
What is she doing?
painting
What's she doing?
listening to music
What are they doing?
they're ice skating
What's he doing?
he's surfing
What's she doing?
rollerblading / in-line skating
What are they doing?
playing video / computer games
Where's this?
cinema / movie theatre
What's he doing?
fishing
What's she doing?
climbing
What's he doing?
he's snowboarding