What's this?
screen
What is she doing?
She's talking on the phone.
What's this?
mouse
What's he/she doing?
He/she is texting a friend.
What's this?
Game console
What's he doing?
He's surfing the internet
What's this?
tablet
What's this?
keyboard
What's she doing?
She's sending an email.
What's this?
mobile phone
What's this?
laptop
What's this?
microphone
What are they doing?
They are taking a selfie.
What's this?
camera
What's this?
printer
What's she doing?
She's chatting online.
What are you doing?
I'm downloading a song/video/movie, etc.
What are these?
headphones
What are these?
speakers