Penny comes home from school eager to share her very own song, but must wait until the time is right to teach it to her parents and the babies.

Penny feels guilty after taking a beautiful blue marble that she sees in Mrs. Goodwin's grass, but gets a pleasant surprise when she goes to return it the next day.

Sophie doesn't enjoy energetic, assertive Wendell's weekend visit until the very end, when she learns to assert herself and finds out Wendell can be fun to play with after all.

When her teacher announces that he is getting married, Lilly the mouse sets her heart on being the flower girl at his wedding.