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Ever wanted a pet but never got one? Well, here's your chance. This little dog walks around while wagging its tail. It can be built with just the pieces in the
NXT 1.0 kit (#8527) plus three big 40-teeth gears. Below you'll find building instructions and a program. While originally designed in 2007, I recreated it with the black NXT in 2009,
as shown on the image to the right.
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