Dump between $20 & $100 in change (depending on the number of students & your budget!) in a pool. At the whistle everyone jumps in and goes crazy trying to collect as much as possible.
You can do so many variations of this with tokens, toys, sea shells, items worth more points, etc.
Jonathan McKee is the author of over twenty books including the brand new The Guy's Guide to FOUR BATTLES Every Young Man Must Face; The Teen’s Guide to Social Media & Mobile Devices; If I Had a Parenting Do Over; and the Amazon Best Seller - The Guy's Guide to God, Girls and the Phone in Your Pocket. He speaks to parents and leaders worldwide, all while providing free resources for youth workers on TheSource4YM.com. Jonathan, his wife Lori, and their three kids live in California.