We love these photorealistic origami models from Raspera. There are over 100 to chose from, with the Sloth and Elephant being our pick of the zoo. Making it even more appealing, you can get your hands on this list through invitation only:
Naturally they come from Japan, with Raspera providing downloadable and printable pdfs of over 100 photo realistic paper crafts in the form of animals and birds. As with many crafts, they all have varying degrees of difficulty to test all patience levels.