Knex - Power & Play Motorized 529 Pieces 50 builds529 ASSORTED PIECES The KNEX Power and Play Motorized Building Set contains 529 parts, including different sizes of connectors, rods, and wheels. These can be clicked together easily for a myriad of 3D configurations. MOTOR INCLUDED The KNEX Power and Play Motorized Building Set is the only set on the market that includes a motor. Watch your childs creations come to life when you attach the battery powered motor to them! SUITCASE STYLE PACKAGING Fuel