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