One of my grandchil'uns is showing interest in the wonders of electricity & I've planned a few simple things for us make in the shop (electromagnet, solar fan, etc) & I was thinking about us CNC'iing an Etch-a-Sketch this coming year if she stays interested. I have some old stepper motors, Mach 3 & a junk box but saw a youtube vid about doing it with an Arduino. If it could load G-code & run without a PC or Mach it'd be swell. We can make simple CAD drawings & post process on the shop computer but I'd like to stay as simple as possible at the E.a.S. itself. I have absolutely no knowledge of any of the Arduino tech & was hoping some of you wizardly folks here could point out the cheapest, simplest ways to accomplish this feat. I've seen some earlier Arduino stuff for peanuts on my favorite surplus site. At this stage in my tinkering career I'm not looking for a new obsession or the latest greatest toys, just trying to fascinate & challenge a brilliant (& so cute) young lady without breaking Pappaw's hobby budget.