Olympian Kristi Yamaguchi's organization Always Dream opened an accessible play park in January 2010.
via its site:
Funded by the Always Dream Foundation, this extraordinary playground is situated in beautiful, 450 acre, Central Park. Inspired by a program that the Foundation helped develop for a summer camp in Hawaii, this playground is a place where all children, including those confronting the challenges of a disability can play together and learn from each other.
Kristi is interviewed in this video about the park