Here is a super fun project. These are the Animal Stackers, created by Adam Dodge. They are based on 3×3 cubes and feature a single stud on top. Allowing them to easily stack on one another. A sort of Lego Totem. This series has 2 sets of six. The North American set contains an Owl, Raccoon, Moose, Polar Bear, Beaver, and a Narwhal. The African set contains a Monkey, Tiger, Elephant, Panda, Rhino, and a Crocodile. There are also a few Stackers on their own, such as the Eagle and Penguin.
Check out the Lego Animal Stackers by Adam Dodge here: https://www.flickr.com/photos/sasklegousers/32268227165/