Doodle Bot is a very simple beginners robot that can write messages using white board markers, jumbo chalk or crayons. The kit comes with all parts including an Arduino compatible controller and a screwdriver. You will need to supply 4x AAA batteries and a suitable USB cable to program the robot.
A large, full colour manual is included to make assembly easy. The manual can be downloaded from here: https://sites.google.com/site/daguproducts/home/instruction-manuals
. This instructable supplements the manual with additional colour photos and text to show the easiest way to assemble the robot.
There is a tutorial for creating font, symbols and pictures here: http://www.instructables.com/id/How-to-draw-pictures-and-create-fonts-using-the-Do/