T-rex
Name an exhibit Rex

Parasaurolophus
Name an exhibit Hollow Horn

Brachiosaurus
Name An Exhibit "Super Giant".

Secrets
Run in Zoo Guest Mode and Photo Safari Mode: Since left-clicking the mouse makes you walk in Zoo Guest and Photo Safari Mode, and so does W or Up, you can walk twice as fast (aka run) by holding two of these

Jurassic Park
Name a guest John Hammond

Raptor
Name A crocodile Slasher

Triceratops
Name an exhibit Cretaceous Corral

Stegosaurus
Name an exhibit Armor