Block Sensor is a rare item in Mario Party DS, only appearing after the 15th turn of a game. Resembling a satellite dish, it allows players to detect hidden blocks that are scattered across the board. When used, the player is alerted that there is a hidden block detected. After the player rolls a standard Dice Block, he or she is awarded with a hidden block on the space the player landed on, regardless of the space. The effects of the space occur and game proceeds from there. A Block Sensor can be obtained by using a Grab Bag or buying it at an Item Shop, at a cost of 20 coins.