Each of the 10 sound buttons in the sound bar provides one word. Children can look at the picture, press the button, and hear the word! The book also features all 25 first words that your toddler should be using by age two. Flaps throughout the book reveal baby sign language for each word. Signing with your baby is considered to have many benefits (behavioral, vocabulary and language skills, fine motor skills, and visual attention). It is also fun, and can be a wonderful bonding experience!