DS game for a 4 year old?

[Kabob]

My nephew is about to turn 4 and his mom is getting him a DS. What are some fun learning focused games?

 

[digiram]

My son likes the backyardigans game, but his favs are the hot wheels racing games and mario kart.

 

[Kabob]

He's got the Backyardigans already I believe, Hot Wheels Racing and MK might be worth a look at, although I think he has the Disney Cars game.