The PLAY Project™ is a parent implemented, intensive early intervention program for young children with autism that is evidence-based. Far too many children with autism are waiting for services. Early intervention can make a profound difference in the life course of these children because their brains are developing at an incredible rate before the age of 5. Children, including children with autism, learn best through play in the natural environment of the home. The secret is knowing how to engage the child in a playful way that promotes his or her development. The PLAY Project is delivered by parents, using their relationship and knowledge of their child to promote engagement. It is cost effective, easily implemented, and can serve large numbers of families efficiently.