It's the hottest day of the year, and to cool down, George wants to build a snowman! But how can he build a snowman when there's no snow? George experiments with crushed ice cubes, but they melt too quickly. Mud... but it doesn't stay in the right shape. And rocks, which are too heavy to lift! George is stumped. What sticks together, doesn't melt, and wasn't heavy? Of course, sand! George convinces the Man with the Yellow Hat to drive him, Bill, and the Renkins to the beach, where they can all cool off and George can finally build his summer snowman.

真夏の暑い日。冬に作った雪だるまを思い出したジョージは、夏の雪だるまを作って涼もうと考える。ところが、かき氷にしても氷は雪玉のようにまとまらない。次に土と水をバランス良く混ぜて泥玉を作ってみるが…。