This is the 150-piece race track set that can be built and rebuilt in more than 263 configurations. Made by Darda, manufacturer of precision-engineered model race cars for 25 years, this set combines spring-powered, "pullback motor" cars with enough track to fulfill any track designer's dream. Whether following one of the 30 included track layouts, or inventing their own, children build towering loops and link them with a daredevil's selection of turns, corkscrews and twisted track. The springs in the two included cars "power up" by rolling the chassis backward, unleashing a scale speed of up to 600 miles per hour. Track segments link together with simple coupling joints and loop segments secure easily on flat baseplates. All pieces store neatly in a plastic storage container. Includes illustrated instructions for 30 layouts. Ages 4 and up. 13" H x 19" W x 10 " L. (14 lbs.)