The park was developed by Pittsburgh's Mellon family as a picnic grove to boost traffic on the Ligonier Valley Rail Road. When C.C. Macdonald took the helm in 1931, rides, entertainment and other attractions came to Idlewild over the next half century, along with the adjacent Story Book Forest. After joining the Kennywood family of amusement parks, Idlewild added a Wild West town, Mister Rogers' Neighborhood of Make-Believe and a water slide complex. Author Jennifer Sopko tells the heartwarming history of a Pennsylvania amusement park that continues to delight generations of families.