Groups of 4. Three feeders (B-D) fan around worker (A) at a distance of 2m. All players except (A) have a ball.
(B) passes to (A) using either a:-
(A) returns to (B) with a chest pass
(A) repeats the exchange with (C), then (D)
As a progression, shout 'Mix It Up!' after 20-30 seconds....the feeder order can then become random, e.g. if (B) just threw, next could be (C / D). The player who wants to feed must call (A)'s name. If both call, (A) makes eye contact with who they will receive from.
Repeat for 45-60 seconds then swap (A).