The story opens with a four-line verse that establishes a rhythmic pattern: "Peter was a white duck, Puddle was black: / Peter could waddle / And Puddle could quack." This couplet-like structure immediately sets up a contrast between the two brothers—one white, one black—that recurs throughout the narrative. The verse form returns only at the very end, creating a frame. The prose that follows describes their physical features in precise, child-friendly terms: "shiny eyes that looked like yellow shoe buttons" and "yellow bills to pick up their food." The description of their webbed feet as "cunning toes on each foot, all joined together so they could swim" shows attention to anatomical detail while maintaining a playful tone.

A Journey in Episodes

The narrative structure is episodic, moving the ducklings from one encounter to the next. After the opening swimming lesson, the plot is set in motion by an invitation to visit Aunt Daffy and Uncle Dilly. The journey is punctuated by meetings with Mrs. Hen, Mrs. Bunny-Brown, and old Toby Turtle. Each encounter provides a small adventure or lesson, and the fox serves as a recurring threat. The journey's endpoint is clearly signaled: "Duckville on the Ditch." The episodes are linked by the ducklings' repeated retelling of their adventures to each new character, reinforcing the story's events for young readers.

Contrasts in Character and Color

Peter and Puddle are distinguished not only by color but by temperament. During the swimming lesson, Peter exclaims, "See how easy it is!" while Puddle sputters, "My feet want to stay up and my head down." This contrast continues throughout: Peter is confident, Puddle more hesitant. The father duck helps Puddle by taking his wing, showing a gentle teaching moment. The brothers' unity is emphasized when they both offer their toy duck Red Pepper to Toby Turtle as a gift, acting "unselfishly." The black-and-white pairing is a simple but effective device for young readers to identify with one or the other.

The Silent Companion: Red Pepper

Red Pepper, a toy duck on wheels, is introduced as a possession but becomes a character in his own right. Described as having "painted eyes" that "never so much as blinked," he is the only one awake during Toby Turtle's long stories. At the end, Red Pepper "sat up on the bank and kept guard" while the turtle slept in the mud. The ducklings give him away to Toby, who appreciates that the toy will "just sit and listen to my stories and never interrupt." This silent observer adds a layer of whimsy and continuity, as he is present for all the later events without participating.

Movement and Pace

The story's movement alternates between hurried travel and restful pauses. The ducklings "had been hurrying and they were tired out" when they meet Toby Turtle. He advocates a "slow steady pace," saying "one could last mighty near all day and night at that rate." This contrast in tempo is mirrored in the prose: short, action-filled sentences during chases, and longer, descriptive passages during meals or storytelling. The final scene shows Uncle Daffy checking windows and doors, blowing out a candle, and tiptoeing to bed—a quiet, secure ending that slows the pace to a close.

Readers may notice how the story's frame—from verse to verse—and its episodic structure make it suitable for reading aloud in segments. The recurring motif of storytelling within the story (the ducklings recounting their adventures, Toby telling tales) invites children to participate in the narrative. The illustrations mentioned in the foreword—ducks eating strawberries, diving with Toby, bouncing in a little red wagon—are not present in the text but are referenced, suggesting the book was designed as a visual as well as a verbal experience.