This is our "Treasure Chest." It's really a copy paper box that's painted black, with gold duct tape and craft jewels. I stock it with season-appropriate goodies as rewards for good behavior on stay-home days. It always has books and sometimes chocolates. It's a good reminder for our boys in reinforcing positive behavior. "Do we want to have a Treasure Chest day today?" is what I ask in the morning, and the box stays hidden until it's time to get to pick a prize.
"Go passes." Each student has two trips to the bathroom or water per day. Once both of their clips are gone they need to "buy" a pass with the money from their classroom jobs. For every clip that is left at the end if the day they can put a ticket into the treasure box raffle! Easy way to monitor how often they go and keep them in check.