The Question Block, also known as a Mystery Block, Prize Block, or ? Block, is a recurring item in the Mario series. It is a block which, when hit, released an item such as a Super Mushroom or a coin. Mario can either jump into the box, use a Koopa Troopa's shell to hit it, or in some games, even Ground Pound on it to reveal the contents. It can be use as a platform to stand above. It looks like a Yellow Block but with a question mark (?).