Showing all 7 results Default sorting Sort by popularity Sort by latest Sort by price: low to high Sort by price: high to low Sale See Details Inclined Planes All Around $8.95 – $22.95 Sale See Details Levers All Around $8.95 – $22.95 Sale See Details Pulleys All Around $8.95 – $22.95 Sale See Details Screws All Around $8.95 – $22.95 Sale See Details Using Simple Machines (Set of 6) $53.70 – $137.70 Sale See Details Wedges All Around $8.95 – $22.95 Sale See Details Wheels and Axles All Around $8.95 – $22.95