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    Ratchet
    $3.50
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    Rack and Pinion
    $3.50
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    Collection
    Paper Mechanisms
    $11.20
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    Worm Gear
    $3.50
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    cam
    Interchangeable Cam
    $3.50
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    Pop Up Robot
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    belt drive
    Paper Butterfly
    $3.50
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    crank slider
    Adjustable Crank Slider
    $3.50
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    Bell Crank
    $3.50
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    Mechanisms Offline
    $13.93
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    character
    Cubug
    $3.50
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    Paper Universal Joint
    $3.50
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    This Much Robot
    $3.50
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    automata
    Tortoise
    $3.50
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    Tortoise
    $3.50
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    Collection
    Paper Mechanisms Complete
    $27.93
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    automata
    Logic Goats
    $11.20
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    automata
    Pneumatic Giraffe
    $3.50
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    Mushroom
    $2.80
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    Beltbot
    $2.80
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    Mobius Snake
    $2.80
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    Snap Up Squid
    $2.80
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    automata
    OddBot
    $2.80
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    donut
    Donut
    $2.80
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    Paper Rob
    $3.50
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    dodo
    Dodo
    $3.50
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    Kuchi-san
    $3.50
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    cam
    Cam/Cam
    $3.50
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    cat
    Schrödinger’s Cat
    $3.50
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    crank cam
    Crank/Cam
    $3.50
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    Collection
    Levers eBook
    $8.40
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    Grrrobot!
    $3.50
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    dinosaur
    Triceratops
    $3.50
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    Star
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    Daffodil
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    Or-Goat
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    Turbine
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    Moose
    $3.50
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    Cardboard Engineering Source Book
    $27.93