Belly Button Book! (Boynton on Board) by Sandra Boynton

This cheerful counting book introduces early math concepts through a cast of charming hippos celebrating their belly buttons. The simple, rhyming text and repetitive phrases like "Bee Bo!" make it ideal for read-aloud sessions, encouraging toddlers to join in. Boynton's signature, expressive illustrations are full of warmth and gentle humor, capturing the hippos' playful antics on the beach. The sturdy board book format and unique navel-shaped die-cut cover provide a wonderfully tactile experience for little hands.

What sets this book apart is its clever focus on a body part toddlers find endlessly fascinating, turning a simple concept into a giggle-filled learning moment. The predictable, bouncy rhythm supports early language development and phonemic awareness, while the inclusive theme of "my belly button" fosters a positive sense of self. Parents seeking an engaging, interactive book that promotes number recognition and joyful participation will find this a repeat-read favorite.