This is a Ladder-Chain & Sprocket Assembly Set from the Educational Construction Series by Tamiya. FEATURES: Black and red plastic parts are attached to sprue trees. Easy construction-all parts screw or press fit together. Includes all hardware needed to assemble the kit. Pictorial instruction sheet is included. INCLUDES: One Ladder-Chain & Sprocket Assembly Set. REQUIRES: Assembly Gearbox from Tamiya"s Educational Construction or Technicraft Series Phillips Screwdriver Hobby Knife Side Cutters Long Nose Pliers Slide Base Adult Supervision COMMENTS: Keep away from children under 3 years of age due to choking hazard. sdw 6/1/01 ir/jl