Here's a new concept board book that young children will love! 1 2 3 Under the Sea uses interactive elements to introduce babies and toddlers to numbers. Children can move the slider to see one crab click-clicking his claws lift the flap to see two seahorses and much more! The mechanisms are ideal for little hands and will engage children as they're learning to count from one to five. To top it off, this book even has a handle--so kids can take it wherever they go!