Even though there seems to be no more room in the mitten that the animals have found they continue to let more and more animals join them since it is so cold outside. (until the seams burst!) It teaches about being unselfish!
Deep in the woods on the coldest day of winter a little boy dops his mitten. And that lost mitten stretches and stretches-and stretches-to provide shelter for many woodland creatures. A ukranian folktale.