The Lincoln Children's Zoo in Lincoln, Nebraska, operates a narrow gauge "C. P. Huntington" locomotive on its ZO&O Railroad train ride around the park. Established in 1963 as the Iron Horse Railroad, the first C. P. Huntington locomotive was delivered to the Lincoln Children's Zoo founder, Arnot R. Folsom, by Richard H. Chance, President of Chance Rides in Wichita, Kansas. The first engineer hired by Folsom in 1963 was a local high school student, J. D. Ayres, who worked as a seasonal employee building the railroad track prior to the Zoo's opening. In October 1963, the city of Lincoln staged a Golden Spike Ceremony attended by the Mayor, City Council, and other local dignitaries. The ceremonial Golden Spike was an actual track spike of a type used extensively in building the railroad, but which had been gold plated for the event. The Iron Horse Railroad operated successfully as the primary revenue generator for the Lincoln Children's Zoo prior to the grand opening in 1965. In 2020, the zoo's original locomotive was replaced with a new electric locomotive.