I bought my 7 year old his first PC for Christmas and he's looking to play a racing car game (after all, he does want to be a racing car driver when he grows up so it's good practice, right?) - with it being the Winter Sale it's probably a good time to pick one up at a more reasonable price.
But I don't play racing games and have no idea what would be most suitable for a kid of his age. From the little I've seen over the years, racing games have tended more towards the technical than motor-control/twitchy game-play.
I'd appreciate any suggestions and some information on what the suggested games actually involve - i.e. is it more light-hearted and gamey like say Mario Kart, or is it more technical and physics simulation based like the more recent Need For Speed type games.