National Toy Hall of Fame
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What links here
Spirograph
Roulette (curve)
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Astroid
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Lissajous curve
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Rose (mathematics)
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Epicycloid
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Guilloché
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Hypocycloid
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Kenner Products
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IC 418
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Harmonograph
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Inkscape
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Hasbro
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Cycloid
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Magic lantern
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