3-2-1, Rattle Battle! is a collection of twelve minigames that generally revolve around players shaking the Wii Remote in order to score points. Controlling a blue cartoon mascot named "Rattle Hero", shaking the Wii Remote causes him to perform a different action depending on the minigame. These includes firing a laser beam to dispatch enemies, bouncing up and down to weigh down a scale and growing or shrinking in size to dodge a salvo of arrows. Each minigame lasts between just three seconds to around two minutes in length.
The game features online leaderboards for high scores for two of the minigames.
Source: Wikipedia, "3-2-1, Rattle Battle!", available under the CC-BY-SA License.