A hermit crab who has outgrown his old shell moves into a new one, which he decorates and enhances with the various sea creatures he meets in his travels.

After eight weeks at Papp's Dog School, Henry's dog Mudge earns a certificate and lots of liver treats.

Retells the traditional Italian tale of the poor peasant woman who, long ago, set out to find the Christ Child and wanders to this day, carrying a sack of gifts to give to good children at Christmas.

Mice whirling and skipping on Halloween night are threatened by an approaching cat, until they come up with a scary trick to defend themselves.

Henry worries about what will happen to his big dog Mudge during their visit to his grandmother's house in the country.

Rex and her best friend Pinky are upset to learn that their friend and neighbor Mrs. Morgan is moving, and it looks like a family with an obnoxious boy named Ollie is set to move in.

While trying out the spy glasses, spy hat, and other items in their new spy kit, seven-year-old Henry and his dog Mudge make a new friend and form a spy club.

Pinky is jealous when his best friend Rex gets the lead in the school play, even though she only tried out to give Pinky moral support.

Henry, his dog Mudge, and his father enter a snowman building contest at the local park and win third place.

When Henry's cousin Annie prepares to move in next door he and Mudge help calm her fears.