Introducing Hide & Seek Safari™ T-Rex. The folks at R & R Games have brought the childhood classic "Hotter, Colder" into the 21st Century. An all new animal for use alone or with the other Hide & Seek animals. Use the Seeker wand to track down and catch this elusive Dinosaur. Lights flash to show you’re getting warmer and the Seeker will sound when the T-Rex is near! 1 9V and 2 AA batteries included.