Thank you to Brad King for contributing this old image.
"All the animals in the zoo are jumping up and down for you....Hoping that you will plan a day to the zoo as soon as you can! Story books that really talk, you turn on with a key, tell fascinating things about the animals you see... All the animals in the zoo are jumping up and down for you... hoping that you will plan a day to the zoo as soon as you can!". Thank you to J B Morrow and Doris Koenig for posting their comments below that describe the jingle regarding the Magic Keys that turned on the story books at the zoo. My wife Karen (North Miami Class of 71) also remembers the jingle and sang it to me without seeing the words once I got her started with a few words.