Now if we stand up to play a game that required two marshmellows with a piece of string tied around them . Have everything ready. If you've never done the game before . Not a pretty sight. Hopefully your staff are there to hang out with kids, not to be just a chaperone.
Chaperones are no fun and no kid wants a relationship with one.
Your staff should get on the teams with the kids and participate as much as possible. Fun memories make lasting impressions. Part of being prepared for a game is knowing how to explain it quickly. Don't be afraid to start a game even when some are still confused. Your staff can help push these people along once you start.