World 3 (New Super Mario Bros. Wii)

Penguin Playground is the third world in New Super Mario Bros. Wii. It is a ice themed world. The Penguin Suit is also introduced in this world. This is also the first world in the game that has a switch that can change the obstacles slightly in levels, similar to Switch Palaces. On the map is an area with ice that has two Ice Bro.s on it. If Mario and the gang are hit by them, they will endure a battle game where they will have to complete the Enemy Course.