What Floats in a Moat?

K-Gr 3—In the tradition of classic cartoon-art picture books, this gem tells a fun, slapstick story while teaching the basic physics of buoyancy and Archimedes's principle. Archie the Goat wants to devise a method of crossing the moat to the castle. His friend Skinny the Hen suggests simply taking the drawbridge, but Archie prefers a challenge and sets out to build a contraption to float. The entertaining spot art done with pen-and-ink and watercolor is full of energy and movement, drawing out the humor in the punchy text. Using barrels of buttermilk, Archie tries to make it across the moat. All day and into the night, much puzzling and experimenting results in a dripping goat and a far less skinny hen. Finally, Archie gets it right and floats across to meet a very frustrated porcine queen who wants to know what happened to the rest of her buttermilk. An author's note further explains buoyancy and wonderful barrel endpapers complete the package. This story will liven up any science class and also hold its own as a spirited pleasure read.—Julie Roach, Cambridge Public Library, MA