Domain Kids - Technology
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Simple Machines
PaperbackOriginal price $8.99 - Original price $8.99Original price $8.99$11.99$11.99 - $11.99Current price $11.99| /Read and find out about six simple machines—the lever, the wheel and axle, the pulley, the ramp, the wedge, and the screw—in this colorfully illu...
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