If you prefer your kart racer purchases a la carte, you could go for the cheapest option of building your collection: the Figure Packs.
The one shown here is Red, but the rest of the main Angry Birds crew is available for purchase too. You also get a Telepod Base, for your small investment, so they're especially good if you're a casual player.Want one? Get one on Amazon. For a full list of the Angry Birds Go! toys and sets, click here.