Scolaire resources for education bring us the clear box tracked vehicle kit as part of their Technology Kits range. Uses sprockets connected directly to the axles and linked together by plastic chain to form a tracked vehicle. Contains all the necessary items to construct a single chassis with exception of adhesives, tools & batteries. See recommendations below. Recommended tools: Craft Knife, Safety Ruler, Fine Tooth Saw e.g. Junior Hacksaw, Hole Punch. Requires 4 x AA batteries (not included). Full instructions with diagrams & template included.