Levers, Lever, wheelbarrow, oar, see-saw, shovel, Wedges, Wedge, knife, ax, nail, fork, Screws, Screw, pencil sharpener, windmill, jar lid, water faucet, Wheels & Axles, Wheel & Axle, Ferris wheel, door knob, car tires, gears, Pulleys, Pulley, crane, flag pole, hoisting sails on a sailboat, Inclined Planes, Inclined Plane, stairs, wheelchair ramp, skateboard ramp, playground slide

3_Simple Machine Sort

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