Note: Here is the step by step instructable! Enjoy it!
Also: Feel free to vote for this in the "Make It Real Challenge" contest! Your votes would help a lot!:D
This project is an example of what ingenuity and patience can accomplish. Right now, this is the only 3D Printed Theo Jansen Mechanism on Instructables. This was designed on solidworks, made to be about 4' tall but when i printed it in the printer, i scaled it down to .375 scale. As you can see, it is still pretty big for a desktop model. I'll eventually post the .stl files soon, but for now, I'll post a motion study video from solidworks to show how this works if your new to this concept.