Red Ring

Red Rings, also known as Red Coin Rings, are objects present in New Super Mario Bros. and New Super Mario Bros. Wii. When jumped through it will make eight Red Coins appear. If all Red Coins are collected, then the player receives an item depending on which form Mario is in.
 * For Standard Mario and Mini Mario, a Super Mushroom will appear.
 * For Super Mario, a Fire Flower will appear. In New Super Mario Bros. Wii, an Ice Flower or Penguin Suit may appear instead, depending on the level.
 * For Fire Mario, Shell Mario, Ice Mario, Propeller Mario and Penguin Mario, a 1-Up Mushroom will appear.

In New Super Mario Bros. Wii, a Fire Flower, Ice Flower or Penguin Suit (depending on the level) is awarded if Mario is in his standard, Super or Mini form.