Hi everyone, while surfing the Net I found a really interesting page which had a pdf file of Optimus prime. I printed the instruction and the template on a thicker paper and here are the results. Optimus can actually transform to the truck and you can bend his knees elbows and shoulders. For better info about him check http://www.paperrobots1999.com/. And if you have some extra time build one of the models included on the page. Have fun and enjoy.