Their magic tree house takes Jack and Annie to the Arctic, where a polar bear leads them onto very thin ice.

A polar bear waits patiently for spring when the ice breaks up, but after months of hunting, paddling, and resting on ice floes, summer ends and the bear must swim very far to find land. Includes facts about polar bears and the effect of climate change on their environment.

Meet five adorable polar bears in this special edition of That's not my polar bear ..., complete with shiny silver edges! Babies love the best-selling That's not my ... books with their bold illustrations, patches to stroke, and a mouse to spot on every page, all designed to develop sensory and language awareness.