I came up with "Pennies for PeePee". We have a potty bank that sits on top of the toilet. Every time Brodie uses the potty, he gets to put a penny in his potty bank; 1 penny for peepee and 3 pennies for poopoo. The results have been fantastic with both of my boys and it is cheaper than buying toys! When potty training is complete and we are ready to break free from the potty bank, we will take Brodie to the store with his pennies (and likely some help from us) to pick out a toy to buy to celebrate his victory.