Teach this before students use their blue jello cards for the first time. They listen better at the beginning of the session than at the end. Students feel pride to learn this trick, and cleanup is much easier.
1. Take your plasti-band off your blue jello cards. Dangle it from the corner of your deck.
2. Put one thumb on top of the plasti-band.
3. Reach and pull the plasti-band over to the top of the opposite corner and let go.