Matthew Perry was very involved in the Lili Clare foundation. It benefits kids with Williams Syndrome, Down Syndrome, Autism and other neurological disorders. He hosted the fundraisers for many years. The foundation was started by Keith and Leslie Litt Resnick.
https://www.reviewjournal.com/life/lili-claire-foundation-strives-to-help-children-despite-economic-downturn/
https://www.cbsnews.com/news/matthew-perry-hosts-lili-claire-gala/
https://www.linkedin.com/in/keith-resnick-5796a192