The children are free to roam around the gym as the music is played.
When the music stops, they all attempt to find a matt to stand on.
The last one to a matt is out.
Option: When the music stops they move to the closest matt and an identifying characteristic of a matt is called. The children on that mat win a point.
The children are free to roam around the gym while the music is playing.
When the music stops, they all must lie on the ground completely still.
The last child to stop moving is out.