Set up with a hoop for each team and a ball in the hoop
The hoops can be placed in the corners of the room - You want to have no more than 5 per team, less is better.
Each team should also have a bib to use as a relay baton - it helps you and them determine who's turn it is.
When the game starts - by coaches whistle - the first player in each team - holding the bib - can run and retrieve a ball from any of the other teams. The method of how they bring the ball back and the type of ball you use will be determined by the sport you are warming up for - Football: use footballs and dribble back with feet, Basketball: bounce a basketball back, Tennis: you could use a racket to balance a tennis ball back etc
When the player gets back to their teams hoop, place the ball in and then hand the bib to the next player who does the same.
If the game is going on for a long time, you can add in extra balls to try and speed the game up, just pop them down in the middle of the area when you like
When a team has 3 balls in their hoop, they should all shout 'FULL HOUSE'.