At Maker Faire this year, there was a TON of stuff see, perhaps too much for my naked eye. Anyways, one of the gadgets that caught my eye were these DIY drawing robots. When you need to draw a lot of circles, these will surely help.
PetBots is a workshop for kids that allow them to build a working ArtBot. Using a simple collection of surplus/recycled motors and switches along with laser cut parts kids can build a working spinBot, jumpBot or even a combination of both or their own creation. A simple Zip-tie/double sided tape construction method allows for easy building an