was removed in 2007; it was brought back by popular demand in 2020 as part of the "Creatures of Habitat" exhibit which features life-size lego animal sculptures and 20 newly installed storyboxes, which offer audio in both English and Spanish. Keys are available for sale, but heirloom keys from the original system will also work. The new system encompasses some environment-friendly features; the storybooks are solar powered, and the new keys are made from recycled plastic. The new keys are available in lion, bear, and gorilla shapes. Cleveland The Cleveland Zoo had the original system installed from 1959 to 1980. The scripts for the audio recordings were written by Fletcher Reynolds, the director of the zoo. According to various sources, recordings were either done by professional voice actors in Hollywood, or by local television performer Linn Sheldon. The system was re-installed in 2017, named ZooKey, with sponsorship from KeyBank, as part of the Cleveland Metroparks' 100th anniversary. The installation includes over two dozen stations. Sacramento The Sacramento Zoo issues keys in multiple colors and animal shapes. As of 2011, keys were available as orange tigers, gold giraffes, and yellow lions. Other locations Audubon Zoo New Orleans Belle Isle Children's Zoo and Aquarium Cincinnati Zoo Como Park Zoo Detroit Zoo Fort Worth Zoo Indianapolis Zoo Louisville Zoo Oakland Zoo Omaha Henry Doorly Zoo Oregon Zoo Potawatomi Zoo Toledo Zoo & Aquarium Turtle Back Zoo Zoo Miami Storyland (Fresno, California) System longevity Keys were sold with the intent that children would hold on to them and bring them back on subsequent visits to the zoo. This has continued to be true over the many years that the system has been in use. There are 50-year-old keys which still work in modern-day storybook devices. Children's Fairyland executive director C.J. Hirschfield noted, "I constantly hear from 30-, 40- and 50-somethings, 'I still have my key!' And I always reply, 'And it still works! Keys as memorabilia Old keys have become collectable, with typical keys being worth anywhere from a few dollars to $225 for highly prized and rare examples. One notable collector, Mark Lyons, got his first key at the Detroit Zoo during a grade school field trip. The advent of eBay led to him collecting the keys and he estimates he has 350–400 keys from various zoos. Notes References Further reading Remember Trunkey the Elephant? (Detroit Zoo) Photo of key from Woodland Park