A musical board book by Mother Moon, on each page, a button plays her soothing voice, teaching kids the importance of feeling each emotion and taking the time to engage with them, good or bad! It's hardback cover, weight and size are ideal for little hands: 8 x 8 x 1 inches and 1 lb. 🔋 Batteries All books come with batteries included. To replace them, you'll need : CR2032 batteries. Some editions use CR2032 batteries, we recommend to check the battery compartment to determine which battery the book uses.