It's about 15min before dismissal. Everything on the lesson plan is complete. The kids are packed up and begging to leave early.
It's the perfect time to play "Magic Trash".
"There is a single piece of trash on the floor that I have identified. It can be big, medium, small or even as tiny as a single staple. If you are the one to pick it up and place it in the trash can, the game is over and you win the prize."
"Ready, set GO!"
I have to be careful to move around the room and not to stare in a particular direction because the crafty kids will stand next to me to see where I'm looking. If somebody does find it early before the dismissal bell, I still win with a mostly cleaned up classroom.
If it's still on the floor when the bell rings, I then walk over, pick up the bit of "winning trash" to demonstrate that there really was something to find and let them loose.