The bear's winter house

The bear is behaving very strangely indeed: collecting moss, logs, and branches to build a winter house. The other animals think this is silly, and laugh at him, but when winter comes, bear is cozy in his house while the other animals suffer in the cold. Being a very kind bear, he invites the others in; but unfortunately for the bear, they are too excited to sleep, and he will get no rest at all this winter. But when spring arrives, he finds a solution.