Put any kid’s creativity in motion with Gizmos. Includes springs, spirals and propeller, plus small, medium and large gears and bases. This big 83-piece construction set can be used alone or combined with other Gears!Gears!Gears! sets. Gears toys are designed to help strengthen problem solving skills, critical thinking and engineering skills All Gears sets are great for learning skills in a hands-on way - tactile learners will love these sets Kids will be challenged to make all the gears spin with the use of 1 crank - an engineering feat This Gears set includes colorful small, medium and large gears, base plates, various connectors, pillars, 6-way axels, crown gear, peg adapters, propeller, crank, and sticker sheet Great for ages 3+