Sandra Boynton’s first book, Hippos Go Berserk!, is approaching its 50th anniversary. Published in 1977, this counting book skillfully guides readers from one to nine and then back again. Rather than proceeding to ten, the book takes a unique turn as ‘nine hippos come to work’ and all the hippos ‘go berserk’ at a lively house party. Despite the chaos, some hippos appear concerned or bored, reflecting a 1970s vibe similar to early Sesame Street.
Boynton’s books have spanned generations, deserving fresh examination. In Hippos Go Berserk!, astute readers, often adults present during story time, may notice the increasing groups of hippos entering the house. Inside, unseen, the number of hippos grows quadratically; at the point of chaos, there are 45 hippos within the house. Counting them requires focused attention, as they appear everywhere.
Although it did not secure children’s book awards initially, the book was honored with induction into the Mathematical Sciences Research Institute’s Mathical Hall of Fame in 2020. Remarkably, the book does not explicitly address its complex mathematical elements, which belies the meticulous calculation involved in depicting the hippos’ antics. This subtlety impressed many, even those predisposed to see Boynton’s work as mere playful interactions featuring colors, sounds, and numbers.
Boynton’s success seems corporate-crafted, yet remains personal. Her nearly half-century career reflects her devotion to creating works she loves. Her popularity owes as much to the appeal of her narratives as to an intent to connect with young audiences on multiple levels.

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