This volume offers a state-of-art review of what is known about young children with Down syndrome from a developmental perspective. The underlying theme of the book is that children with Down syndrome, despite their constitutional anomalies and their additional medical and biological problems, can be understood from a normative developmental framework. Interventions guided by developmental principles in the biological, educational and psychological realms are more likely to result in informed knowledge about how best to help children with Down syndrome and their families. Children with Down Syndrome will appeal to researchers, theoreticians, educators, and clinicians in a range of disciplines, as well as to parents, social policymakers, and other advocates for the best interests of children with Down syndrome.