Build an unpredictable compound pendulum with two weights, a piece of string, and a fake mouse. Your cat will love you for it.
The post String Up a Simple, Chaotic Double Pendulum Cat Toy appeared first on Make: DIY Projects and Ideas for Makers.
from Make: DIY Projects and Ideas for Makers http://makezine.com/projects/string-up-simple-chaotic-double-pendulum-cat-toy/
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