The best thing about staying in hotel rooms--bouncing on the beds! Oh, and this cracked me up--one hotel we stayed in in New Mexico had a red theme, and another had a green theme. He called them New Mexico Red and New Mexico green, and he doesn't even know about chiles!
While we whiled away our car hours, we enjoyed a little Auto Bingo--a game destined to become more and more fun as he grows up.
The biggest winner for killing time in the car, though, was a Playmobil catalog. I think he spent about four hours reading this catalog.