Pairs walk around and play ball over: one hand catch and throw.
Repeat but with wrong hand.
Twosome; A walks from left to right B throws the ball accurately into the circle; after 1 minute change.
Same but A now turns away to the right at the end; is a good coordination exercise.
Twosome; players start next to each other; A runs away and gets the ball in the barrel; throws back with turning jump; on the way back A gets the ball again and plays off with two hands; after 1 minute change.