This set is scientifically designed for brain development in babies. Its elements help in baby’s development by providing visual and auditory stimulation along with the developing fine motor skills. For Auditory Stimulation of Your Baby; Rattles provide a source of stimulation. Babies like the sounds they produce and follow the path of the rattle with their eyes, as well as giving them a sense of discovery as they try to grab and hold the rattle, thereby developing their fine motor skills. Experts in child development believe they help infants improve hand eye coordination by stimulating their senses. When babies are born, they see in black and white. This high contrast board book uses familiar settings and objects to present shapes and patterns in contrasting black and white images. Einstein Box has been designed by parents for parents specifically keeping in mind your babies brain development. The items in this set are absolutely non-toxic and child safe.