Half of the players inside the area and half outside. 1min and then switch roles.
Players in the middle get passes from the sidelines:
1. return the pass back to the sideline with one touch
2. two mandatory touches before passing back
3. header
4. half-volley return to the arms of the player on the sideline
5. control the pass and then pass to another player on the edge of the area who doesn't have a ball
6. chest control and pass back
etc.
Quality factors
Sharp steps when moving to receive the ball from the sideline.
Vocal communication when calling for a pass.
Execute all techniques with care.