The Basic Racer kit provides a basic wooden block that's shaped to meet Boy Scouts of America regulations. It simplifies the most challenging parts of custom racer design — you just start here and add your choice of Pinewood Derby® wheels, weights, paint and decals. Includes: shaped wood block that meets Boy Scouts of America race-legal dimensions, two pre-cut axle slots for easy, accurate axle/wheel assembly, expert instructions to guide you toward completing a unique, champion pinewood car. Length: 7". Width: 1.75". Height: 1.3". Age: 8+