A bear sees that humans fill their garages, or "caves," with things and he decides to do the same, until there is no room for him to even move around in his cave home.
"A young girl likes to collect and sort objects such as buttons, rocks and stamps. She arranges objects by color, shape or size and shares in the fun with her parents and friends.
"Worry Bear loves his sticker collection, but when his quest to find more stickers separates him from his friends, he learns that friendship is more important than possessions"--OCLC.