I have entered the Endangered Species contest this Christmas. Originally design to print out at a 12cm scale, but try any size you like. You can download the bears in stl file format for free. They have been test printed and and approved to make sure they will print out properly. Below you can download the models for 3D printing.
———-Polar bear model link———-
Polar bears are at increasing risk due to the ice now melting earlier and freezing later. Charities like Polar Bears International are dedicated to saving the polar bear by saving their habitat.