Hot Wheels Potty Training

We've been working to get Isaac potty trained lately- I had been dragging my feet, but it's really time for him to give up diapers. We have tried everything to motivate him including a very, very silly "Pee Pee On The Potty!" song and dance. I read about someone using Matchbox or Hot Wheels cars as reward so we thought we'd give it a try. It's working well with Isaac. He is well on his way to wearing his Lightning McQueen skivvies instead of Huggie's. He's also learning a lot about cars- he'll hold up a car and tell me, "This is a GTO, this is a Woodie, this is a Porshe..." Now if we could only find a place to put all these cars!