My significant other and I decided it would be neat to have some sort of way to track the little ones good behavior, so we came up with the Reward Board. The children will have pieces (whatever they choose to be) that have dowels in the back. Each good deed will leave them closer to the star on the right. Once they get there they can exchange for a prize or continue to save for a bigger prize (this is kept track by little stars that go in the three holes to the left of their name).
Hopefully this will get them to start acting even nicer and possibly teach them the benefits of saving.