Set your little engineer's imagination in motion. Fun, bright colors and easy-to-assemble pieces help build fine motor skills, encourages creative thinking and takes building to the next level by adding fascinating spinning motion with the 2 included cranks. This deluxe gears set includes 150 pieces, storage tub, and activity guide and can be used alone or combined with other Gears Sets. The idea is to stack and interconnect gears, using pillars, axles, brightly-colored springs, gears and bases that will make it easy for your child to come up with dozens of distinct combinations for hours of imaginative play. This educational toy can be connected in different ways to demonstrate the action-reaction in a series of gears. Gear up for hours of fun with this giant building set that gives early learners hundreds of construction possibilities.