Here's a second installment of some of the linkages/mechanisms we've been playing around with. For this rotating scissor linkage we used heat shrink tubing to join repeated S shape bends. Modifying the S to have one shorter segment allowed for the rotation, which gave us the star shape. Really we just love stars!
Download the SVG below and try it out for yourself - it's a quick one. Maybe stick a boxing glove on the end. Or try bending and assembling your own mechanism.