This game is a variation of Musical Balls, and uses the same 20 x 30 defined dribbling area (with cones or discs).
Set up the storyline by asking your players "Who likes to go shopping?" Take a minute to ask them what they like to shop for (you'll get some funny answers).
Then explain that the whole team is going to go shopping for new balls, and that they'll find them at the "Mall", which is your entire dribbling area.
The game starts with the players dribbling around the "Mall". When you yell "Go Shopping!", the players are to leave their ball and go buy a new one, by claiming a ball that someone else has left.
After a round or two of this, then tell them to look out for "Burglars" (the coaches), who will try and steal the balls first! If you choose you can have any players that don't end up with a ball do a small challenge (5 sit-ups, etc.).