As she tries being one creature after another, from a cat to an elephant trainer, Missy the mouse discovers that everyone has problems and that she can find happiness as herself.
Buzzie becomes unhappy with her role as a worker bee and starts a revolt at her hive, until she discovers that working together is the best way to be happy.
When the three big trains refuse to go up the mountain in the deep snow, the Little Red Train finds brave helpers and goes on a rescue mission to take food to the stranded villagers.
Millie was so upset that she couldn't have her own way at home that she ran away to the city; however, instead of having fun, Millie was miserable, hungry, and wanted to go home.
Speckles the spider and Crumbs the cricket think a caterpillar is too ugly to be their friend, but Annie the ant insists that something beautiful might be inside.