Another shape I return to time after time is this cog shape. influenced partly by all the steam punk jewellery there is around and started by my need to just plain fiddle about with stuff. My cog stencil started life as a Tipex mouse I had at work.
Once I had wasted all the correction stuff (tape?) by drawing pictures with it while talking on the phone and colouring them in with highlighter pens. I naturally had to take it to bits.