WoW!! Light the fireworks, I think this is a huge victory for you!! You finally found something that Charlie finds comfort in. He looks so darn cute in his playpen in the back of your car. Make sure you somehow attach it to the car though (I am always a worry freak about car accidents).
I'm so very happy for you, your wife and Charlie. Screaming only when he gets home is great! He must be enjoying his ride and just super excited to be back home after.