While out on a fishing trip, Father Bear recounts to Little Bear how he met his whale friend, Mighty.Mitzi is a precocious little monkey. She meets Little Bear and the gang and, after a shaky start, they all become friends.
Little Bear and his friends make up a song and do the actions that go along with it.After Little Bear awakes to find Mitzi sleeping outside in a tree, he and his friends build her a tree house of her own.
The gang loses Lucy and their imaginations go wild, creating a multitude of imagined horrors Lucy may be facing. Little Bear bravely rescues Lucy from the real horror of having fallen into a small, dark cave.
Little Bear fantasizes about being small so he can follow a spool of Mother Bear's thread into the bushes. He has an interesting adventure being tiny, meeting insects, birds, and being rescued by No Feet.
Emily and Little Bear collect a variety of natural wonders such as flowers and leaves for their nature collection. They show their collection to Mother Bear who teaches them more about the wonders of Mother Nature.
A cricket is carried into the house with the firewood by Little Bear and Emily. The cricket gives everyone an excuse to have a little party, with Granny playing the squeezebox and everyone joining in and singing.