Laser PegsTM are the world's only lighted construction set ! National award-winning Laser PegsTM, is the first toy in the world where the pieces snap together and glow with brightly colored LED lights. Your child can design and build anything they want with Laser PegsTM, and have the option to keep them lit or turned off. Laser PegsTM use a high quality LED that will run about 100,000 hours, which is equivalent to keeping them illuminated non-stop for 11 years! The 3-in-1 Kit comes with 72 pieces, one power unit, three AA batteries, an instruction booklet, a plastic tray to store the Laser PegsTM. Plans for the following Laser PegTM models are featured in this creative toy kit: the Mini Monster Bug, the Tractor, and the Dune Buggy. You can also create some of the other models shown on the models page in the instruction booklet. Or you can use your own design to create any abstract model you can imagine. You can also combine kits and power units to build a gigantic model. This is a great construction set with many toy model building options and can be enjoyed by kids or adults for many hours at a time! The 72 Piece kit is designed for children aged 7 and older. Kit size: 12" X 8" X 2.5" Kit weight: 3 lbs WARNING: CHOKING HAZARD -- Small parts. Not for children under 3 years.