Item Box
Item Boxes are boxes in the Mario Kart series. Item Boxes look like ? Blocks but are transparent and often blue, and in more recent games they have a iridescent checker board pattern. When a character passes through them, they will get a random/semi-random item. These blocks also appear in Mario Tennis and Mario Power Tennis. They have appeared in all the Mario Kart games, except Super Mario Kart where they used ? Panels.
In the Mission Mode of Mario Kart DS, the player's task occasionally is to destroy a certain amount of Item Boxes (which often contain Mushrooms to give the driver a boost).
There are also Fake Item Boxes and Double Item Boxes.
The name Item Box has another meaning in the Mario Kart series: It is also used for the small box at the top of the screen which shows the player his current item.