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 and encourages creativity by allowing changes in the build design process.
They are called “PetBots” from IsoBots.
See video of it in action: