Ever wanted to hold your 3D creations in your hands? There is rapid prototyping aka 3D printing which has became more affordable over the years. But if you still can't muster up the cash for those services (let alone buy one of those machines which costs at least $ 30,000 USD a piece for the lower end ones), you can always turn to papercraft, which only requires a printer, mastery in 3D modeling and paper-folding.
First, make a model in your favourite 3D program. There are certain rules to follow when modeling for paper. As each polygons represent a folded surface, you want to avoid tiny polygons unless you have tiny fingers to fold them. This depends greatly on you intended size for the final product.
3D model created in Lightwave in 15 minutes.
Three A4 size pages generated by Pepakura.
The final product is about 15 cm tall. Some parts looked "sorry" because the surfaces where tiny and difficult to fold, and we used cellophone tapes instead of glue to put it together. Notice the lack of the bell on his collar and his missing tail.
For more impressive feats of papercraft using Pepakura, follow this link (literally).