Kids will be thinking and building like engineers as they turn recyclables into machines that move. Winches Set turns a popcorn box into a tow truck; then build a Jeep, a well and a crane that all move-thanks to winches. For each build, you're given Engineering Challenges; experiment with friction, torque and propulsion as you engineer your solutions. Once you've mastered all four builds, get creative and design something that's all your own! Includes building pieces, an instruction booklet and a ring of 10 cards with engineering challenges and tips. Kit contains:• Tow hook, spool• Two long connectors, five short connectors• Medium gear, small gear, four large wheels• Four 7-inch rods, 5.5-inch rod, two 2-inch rods• 26 hub caps, hole punch, 13-inch string• 10 Engineering Challenges Age Recommendation: Ages 7 and up
