The Fukui Prefectural Dinosaur Museum in Japan has a web site offering three dinosaur papercrafts under the kids section. The papercrafts are not highly detailed but instead are simple shaped ones aimed at beginners. The dinosaur papercrafts include an Iguanadon, Parasaurolophus, and a Diplodocus. These papercrafts were designed by Naohito Fujio / Nafmaru Paper-works.
Dinosaur Papercrafts [FPDM]