Mario Kart Wii Age Rating: Understanding PEGI 3

You're asking about the "U" rating, which is a European rating system.

Mario Kart Wii is rated PEGI 3 in Europe, which stands for "Pan European Game Information" and is equivalent to Everyone in the US rating system. This means that the game is suitable for players of all ages.

So, yes, Mario Kart Wii is compatible for players of all ages in Europe.