A girl named Little U puts objects that begin with the letter U, such as an umbrella, some underwear, and an ugly duckling, into a box.

Nancy, who likes to use fancy words, is excited to wear her elegant nightgown for Pajama Day at school, until her best friend Bree and her classmate Clara impress everyone by wearing matching pink polka-dot pajamas.

A girl named Little N puts objects that begin with the letter N, such as nuts, nine nightingales, and their nests, into a box.

A boy named Little E puts objects that begin with the letter E, such as eggs and elves, into a box.

A boy named Little O puts animals that begin with the letter O, such as otters, an octopus, an ostrich, and an ox calf, into and on top of a box.

Introduces, in brief text and illustrations, the use of the letter combination "ow" in such words as "cow," "meow," "eyebrow," and "plow."

Pictures and rhyming text involving chimpanzee twins Chimp and Zee introduce words for everyday things, including clothes, food, animals, colors, days of the week, and numbers one to ten.