Items are Fun!
From the Super Mario Wiki
Items are Fun! is a secret level in World 5 of Yoshi's Island: Super Mario Advance 3. The level can either be very short or very long, depending on whether or not the player goes down the pipe or automatically goes to the GOAL! Ring. If the player chooses to go to the GOAL! Ring first, he or she cannot get one hundred points.
This level contains areas, which involve the use of different items, which can range from Watermelons, Huffin' Puffin chicks, and basic Eggs. Even the snowball from Ride the Ski Lifts makes an appearance. Some of the areas, however, involve activating certain events to get to. In order to earn 100 points, the player needs to investigate every area that this level holds. All the items in the game appear in this level, so the player can play around with any items they want.
 Names in Other Languages