Good Gameboy Advance Game for a 4-year old?

[Queasy]

My sister got her son a GBA with the Cars game (he loves him some Lightin' McQueen). She also got him Donkey Kong Country II since that is what my son has. I'm trying to think of a simple but fun game to get him since both of those are kind of too challenging for a 4-year old. He's not as good at videogames as my son right now simply because he really hasn't been around them that much whereas my son has a gamer for a dad....

Anyways...

Super Monkey Ball?
Super Mario Advance?
Pokemon Pinball?

 

[MX2]

Lego Star Wars
SpongeBob