Central Illinois Down Syndrome Organization (CIDSO) is a 501(c)3 not-for-profit organization. CIDSO was established in 1974 to act as a support and educational service for the families primarily in McLean County who have been touched by Down syndrome. CIDSO is the second oldest Down syndrome parent group in Illinois and was instrumental in the development of numerous other Down syndrome parent groups below Chicago. CIDSO was founded by Bill and Diane Crutcher, and Steve and Penny Schimpler, all of whom were parents of newborns with Down syndrome at that time. The Crutcher's remain active in CIDSO to this day. Membership is available to anyone over age 18 who is a member of a family who has/had a child with Down syndrome and meets other eligibility requirements as adopted by the general membership. To be a voting member, individuals must complete an annual membership form (in January of each year).