The What Do You Hear Soft Activity Book is perfect for little hands and encourages learning through repetition and developing coordination skills. Each panel features a unique musical sound. Press the soft covered musical note attachment to hear five different sounds corresponding with the images on the book panels. The soft book uses different textures throughout for a great tactile experience. Book also has flip up pieces for a peek-a-boo experience, a record that spins and a peek-a-boo mirror. Folds easily and has ribbons to tie it shut and a loop for easy attachment to strollers and carriers. Includes non-replaceable batteries. The Baby Genius Learn & Grow program has been developed to correspond to five stages of natural growth. The What Do You Hear soft activity book is part of the Discoverer stage (6-12 months) featuring products that encourage self-discovery.