Advanced spinning, turning, twirling building set with three sizes of gears! Kids can create complex moving machines with this big 130-piece set of interlocking gears, bases and connectors. Set includes: 8 peg adapters, 1 crank, 18 small pillars, 12 large pillars, 6 pillar connectors, 12 6-way axles, 24 small gears, 12 medium gears, 8 large gears, 6 large bases, 8 medium bases and 12 small bases. All pieces are fully compatible with all other Gears! Gears! Gears! sets.