You usually see these kinds of gravity-powered walking toys made out of wood, but Jason Allemann has come up with a way to construct them out of Lego instead. And all you need to build your own walking duck and kangaroo is the proper Lego pieces, and the laws of the universe to still be in place by the time you’re done.

The video breaks down how each of the models work, but if you can’t figure out how to build your own after watching it, Jason has also provided complete Lego-like instruction manuals for download on his website. [Jason Allemann via The Brothers Brick]


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