Henry is excited when his Uncle Jake builds him a tree house but worries that his dog Mudge will not be able to enjoy it with him.

On a hot summer day, Mr. Putter, his cat, Tabby, their neighbor, Mrs. Teaberry, and her dog, Zeke, go for a picnic and a rowboat ride.

After noticing that a visiting hummingbird likes her pink petunias, Annie and her rabbit Snowball, accompanied by Henry and his dog Mudge, fill the garden with pink objects to attract more hummingbirds.

Henry, his parents, and his dog Mudge take a vacation out West, where they enjoy tumbleweeds, desert animals, souvenirs, and the wide open spaces.

When Mr. Putter cannot sleep after eating too many of Mrs. Teaberry's pineapple jelly rolls, he and Tabby take a moonlit stroll that ends with the perfect neighborly gathering.

Henry, his dog Mudge, and his parents go on a quiet camping trip to Big Bear Lake, enjoying the clean smell of trees and wonderful green dreams.

When Mr. Putter catches a cold, his friend Mrs. Teaberry sends over some special treats to help him feel better.

Splat the cat's bicycle bumps and jumps over the bumpy track on his way to school, until . . . crack! Splat takes a tumble off of his bike and finds himself nose to beak with a duck. When the duck does not make a sound, Splat packs the duck in his backpack along with his school supplies to his teacher, Mrs. Wimpydimple, who will know what to do, and heads off to Cat School.

Annie and her pet rabbit, Snowball, invite Henry and Mudge to a dress-up birthday party, but there is some confusion about what the guests are supposed to wear.