Bravo for the belly button! Emboldened by the enthusiastic response to “Belly Button (Round)” -a song from her Grammy-nominated book/CD, Philadelphia Chickens-Sandra Boynton further contemplates this mesmerizing subject. Featuring a beachful of bare-bellied hippos-including one tiny baby who can only say “Bee Bo”-the “Belly Button Book” is the latest quirky addition to the phenomenally successful “Boynton on Board” series. Every page captivates with Sandra Boynton’s inimitable illustrations and joyful rhyming text: Soon after dark, upon the beach, we sing a hippo song, and if you’re feeling in the mood, we hope you’ll sing along: “Belly Belly Button, you’re oh so fine. Ooo, Belly Button, I’m so happy you’re mine.” Shiny and sturdy, and featuring a great (navel-shaped, naturally) die cut cover that offers a provocative glimpse of the merriment inside, the “Belly Button Book” provides enduring, giggly, read-aloud fun.