In the mid- to late-1980s, the Pacific Science Center ran several iterations of the traveling robotic dinosaur exhibit "Journey Through Time." Generally running for a few weeks after Christmas while children were on break from school, the show featured half-size replicas of dinosaurs, other reptiles, and mammals, with moving parts operated through pneumatic pressure. The Pacific Science Center eventually opened a permanent animatronic dinosaur exhibit in the 1990s, "Dinosaurs: A Journey Through Time," which continued to entertain visitors of all ages until 2025.

This poster advertises the exhibit "A Journey Through Time: Back to the Age of the Dinosaurs and Beyond," part of the Pacific science Center's "Science Circus." Based on the opening and closing dates, this is probably the show that ran from December 26, 1985 through January 6, 1986.

Caption information source: "Big Beasts for Small Fry," by James Lelonde, Seattle Times, December 28, 1985, P. C1