How to Make a Cube Using Magnets and a Plastic Bag
Today's math/science nerd party: George Hart demonstrates how a set of magnetized square shapes will self-organize into a cube, when placed inside a plastic bag and shaken. This behavior arises because the magnets themselves (due to their polarity and configuration) trend towards cube-ness. I think I just learned kung fu.
Bonus points: George Hart is Vi Hart's dad. A family of awesome math video makers!