Some drool.

Others growl.

Some simply eat their prey.

The Jurassic period has come back to life -- with the help of modern technology -- at the Columbus Zoo and Aquarium.

Dinosaur Island, a frequent exhibit, opened May 19.

Karen Huebel, director of theming and interpretive design at the zoo, said the exhibit has 37 displays -- including 20 life-size creatures that roamed the earth 65 million years ago.

Located in the Australia and the Islands section of the zoo, Dinosaur Island features the biggest of the big -- the Tyrannosaurus rex and giganotosaurus, for example -- to the smaller, such as the beelzebufo, a frog that actually was quite large, compared to similar amphibians today.

Huebel said setting up the exhibit was no small task, with some animals being hoisted in by cranes. Zoo staff members, meanwhile, created some of the creatures on the premises.

The dinosaurs have a skeleton of steel, with urethane-covered, waterproof skin, she said. They have eyes that shift and blink, tails that move, mouths that make noises and electronic brains that activate and control their movements and sounds.

Some of the displays are interactive, so zoo patrons can control the movements of the dinosaurs.

Patrons can take a walking tour to see some of the displays, and a short boat ride -- $2 for zoo members, $3 for all others -- will give the full effect of the presentation, Huebel said.

"Kids love dinosaurs," she said. "They love seeing them."

Dinosaur Island will run through Oct. 31.

"We are very excited to bring back this popular attraction for our guests," said Tom Stalf, president and CEO of the zoo. "Dinosaur Island offers an engaging and fun-filled experience for visitors of all ages, while also providing a chance to learn about these incredible species as the dinosaurs are brought to life through movement, sound and other exciting effects."

More information about the exhibit and the zoo is available at