Disney Conquers Physics, Uses 3D Printing To Create Impossible Spinning Tops

 Have you ever been sitting around bored and found yourself trying to get some random household object — a battery, a pen, whatever — to spin around like a top? Disney has taken that idea to a pretty grand extreme. Combining the power of 3D printing and some damned clever physics work, they’ve worked out a way to make just about any shape spin for ages. The idea: if you…