Explore and build endless even more possibilities by combining this colorful puzzle with twice as many gears as our standard set. Take them apart and assemble them over and over -- a new way each time Then watch them move as you twirl the gears. This enchanting puzzle encourages creative play and problem solving. Children will learn cause and effect as they observe what happens when they turn the gear-shaped puzzle pieces. Appropriate for kids ages 2 and up. Made from ecofriendly, safe and sustainable PlanWood. 24-piece set with gear-shaped pieces measuring 5.5 in x 5.5 in x 0.9 in.