9 links have been added on 3 ideas about #shape.
  1. soleo

    Does anyone know where I can buy a working version of this set of cogs jigsaw? – I mean, so they all rotate – wanna connect it to a clock.

  2. Jimbo

    Loved this idea so I searched for it but wow this is pricey!

  3. It all started with John Chapman, a.k.a. Johnny Appleseed as far as this article is concerned.