Stamps are collectible items that you can collect in Wii U games. They were introduced in 2013 with Super Mario 3D World. Stamps allow you to paste special images to your handwritten posts and can be used as alternatives to drawing. You can use the stamps however you want to, allowing for users to cook up some creative posts. Games compatible with stamps include Super Mario 3D World, NES Remix 1 & 2, Mario Kart 8, Animal Crossing Plaza and more.