Turing Tumble is a new type of game where players (ages 8 to adult) build mechanical computers powered by marbles to solve logic puzzles. Use ramps, crossovers, bits, interceptors, gears, and gear bits to build marble-powered computers that can generate patterns, do logic, count, add, subtract, multiply, divide, and much, much more! Discover how computers work! Includes: This kit includes everything you'll need to start building computers (no batteries required): Computer board Computer stand 30 Ramps 10 Bits 8 Gear bits 6 Crossovers 4 Gears 3 Interceptors 1 Presser Puzzle/comic book with 60 puzzles 20 Red marbles 20 Blue marbles 30 Counterweights 8 High friction washers Specifications Product box dimensions: L 44.5 cm x W 34.5 cm x H 9.9 cm Product weight: 3 kg