The Foot Powered Scroll Saw Makes A Jig Saw Puzzle woodworking video by Chop With Chris shows the construction of a DIY scroll saw using flea market parts and then uses it to make a jig saw puzzle.
Most jigs, however, are considerably simpler and more static than this CNC-controlled scroll saw ... of the jig. The video below shows it in action; things do get a bit wobbly as the cut ...