Light Up dice work great with dice games like Monopoly, Yahtzee, Backgammon, and Dungeons and Dragons. These 30mm Light Up dice are transparent red plastic which glows brilliantly when rolled. The bright red LED lights dance in a rolling pattern when it is activated and remains lit for 60 seconds before going to sleep.  The display also flashes ten times giving a countdown warning to the players. This gives games an extra kick of speed and excitement. What's the secret? The secret is one of the worlds’ smallest and most inexpensive computer chips. Barely the size of the head of a pin, the computer has incredibly low power draw when the dice are asleep. Light Up Dice have an estimated shelf life of 4+ years. The sensor activated LED display is mounted to a patented double pivot, or “gimbal”, which always faces upwards due to the weight of the long lasting battery. Key chain Light up dice are also available - nothing says "hot rod" like dice hanging in your car, and ladies - never lose your keys in your purse again, just shake your purse and the dice will light up. Launch date: February 2013.