Play Lane Rider Games Online. BusGames.org is a great place to play free bus games. Flash games with buses are rare but it makes them more interesting.
Now, kids can play another car game for kids on CarTitans.com. This game is different from other ones because you have to collect symbols in a certain order. Its hard to learn all the combinations, so most people just bump into things on the road. Your kids are safe with this game because it has no explicit content or ads in it.