The Tree House by Marije Tolman & Ronald Tolman

A polar bear swims out in a body of water only to come upon a tree with a tree house at the top.  The polar bear decides to stay and soon, many other friends come to join – a brown bear, some flamingoes, a rhinoceros, a couple of panda bears, a peacock, and more!  This wordless picture book allows you to use your imagination to think about how the different animals came upon the tree house, how each day at the tree house brings about different friends and events, and how friends may come and go but we are never truly alone.