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jpdoyle: Zig-Zag Shaft with domino planks & spiral tower
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jpdoyle: The Zig-Zag Shaft (video)
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jpdoyle: Keva Contraption #2 "The Cadastle" (video)
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jpdoyle: Keva Contraption #1 (video)
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jpdoyle: Keva Contraptions "The Hopper-Dropper" Part 1 (video)
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jpdoyle: 045
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jpdoyle: 048
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jpdoyle: Tower of Triumph
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jpdoyle: Ball racetrack, built out of a great birthday present of wooden planks (video)
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jpdoyle: Contraption demo (video)
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jpdoyle: Keva Contraptions - latest and 2nd greatest (video)
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jpdoyle: Here's one I made earlier
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jpdoyle: Master builder at work
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jpdoyle: I can name that tune in two notes (video)
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jpdoyle: Checking every angle
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jpdoyle: The Roll-Bounce-Catch Combo (video)
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jpdoyle: Hot Wheels Mega Layout
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jpdoyle: 017
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jpdoyle: The Backfire Contraption (video)