Mission: Cross The Laser Field Before It's Too Late! Chrono Bomb® is a super secret spy mission where kids use the included clamps and 27.5-ft. string to create a "laser" field to crawl through. At the end of the maze is the bomb, counting down...tick, tick, tick! So, you have to hurry, carefully, and make it to the end to defuse the bomb and be the hero! Play over and over again, building new courses each time or trying to beat your or your friend's time! Includes free app for more play value! Requires three AAA batteries, not included. Contents include 10 Cards (8 Gear Cards and 2 MissionCards), 4 Standard Clamps, Reel Clamp, Sensor, Bomb, and Rules. For ages 7 and up.