There is a new drawing app called 'Paper' that makes me want to get an ipad for drawing. It has diffent BOOKS that you can sketch into and seem simple and easy to use as well as the awesome rewind option. Oh yeah it's free for just the basic tool. I'm hoping they will go cross format(android & windows 8). Check it out.
Check out the Piccolo a mini CNC drawing machine that can draw repeatatly what you want.
Piccolo is a pocket-sized stand-alone CNC platform. For less than $70, you can assemble your personal Arduino-compatible kit for tinkering, developing and deploying basic 3D output. Be it plotting quick graffiti, printing a one-off business card on the fly, or multiple Piccolos working together to create a large mural, this kit provides a platform for experimenting with 2D or 3D digital fabrication at a small scale. This open-source design emphasizes simplicity, and is entirely composed of digitally manufactured components and inexpensive off-the-shelf hardware.