Relay to practice using necker as a sling
Teams line up in relay formation with one member acting as victim and standing in front of his team 30 feet away. All other people have their neckerchiefs on properly.
The first member on each team runs to the victim, asks what is wrong, and applies an arm sling to the arm indicated.
When the judge sees that the sling is correct, he calls out "Cured!".
The team member removes the sling and becomes the victim. The previous victim runs back to touch the next member of his team. This continues until all on the team have been victim and rescuer.