Stamps are unique collectibles in Super Mario 3D World, used for decorating your Miiverse posts (though this feature is now defunct, they remain a fun collectible). Each main level has one Stamp, usually more cleverly hidden than Green Stars. They often require precise platforming, solving a small puzzle, or finding a secret warp pipe. Look for areas that seem out of place or require a specific power-up to access. Some are even found by defeating certain enemies.
