They're going to ...
play volleyball.
She's going to ...
go caving.
I'm going to ...
swim in the lake.
You're going to ...
go to the beach.
He's going to ...
go fishing.
You're going to ...
cook on the campfire.
He's going to ...
take photos.
We're going to ...
go kitesurfing.
I'm going to ...
climb a mountain.