(This is a re-post from the old Geomag forums)
Material: You will need 336 Geomag bars to build this model.
Click the image for full size view
Challenge: A modular approach. I leave it to you discover the end result, and only the photo above is given as instructions.
Credits: I can't take credits for the finished model. I saw this model on a page with Geomag creations on gozmoz.net in 2004. Unfortunately the model page does not exist anymore.