This guidebook for parents and early intervention personnel was developed by the "Let's Play! Project," a 3-year federally supported project that worked to promote play in infants and toddlers with disabilities through the use of "low-tech" assistive technology. The guide is organized around six emerging stages of play development: (1) sensory exploration, (2) functional exploration, (3) material manipulation, (4) pretend/fantasy play, (5) creative expression, and (6) language and pre-literacy. Each section then focuses on one stage of emerging play and includes information on what the child does, what the caregiver does, play materials, and positioning options and adaptations. (DB)