9It's classic Boynton, supersized! Belly Button Book! is available as a lap-sized board book. With their appealing format and sturdy board construction, Boynton Lap Books are easy for little fingers to grasp, and are the perfect size for big people to read aloud during story time. The colorful illustrations positively pop on the large pages. Kids will proudly display their middles alongside the crooning hippos in Belly Button Book!