Few children can communicate effectively before eighteen months of age, but sign language can allow baby and parent to reduce the frustration up to a year earlier. With more than 450 full-color photos, text, and sidebars, Knack Baby Sign Language provides a user-friendly, efficient method to learn and teach a baby sign language. Organized by age, it provides signs appropriate to use with babies, with toddlers, and with older children for whom signing with games, songs, and rhymes is enriching. The signs can also be used with special needs children and those with delayed communication abilities.