Hi
Warming up is important and it can also be fun.
Here is a nice little game which has the merit of participating in the warm-up and which also allows you to work on ball touch and cushioning.
It's quite simple, 7-point game in the service squares (on a half court).
Between each strike you have to touch the line of the service squares with your racket. (The video demo is more telling than the drawing.











Download this sheet in PDF format