Jurassic Park World Thrash 'N Throw Roaring Stomp T-Rex Dinosaur 2017 WORKS. The foot plate on his back left toe is not flush and sometimes pops out and needs to be popped back into place. Does not affect the functionality. Makes sounds and stomps as intended. Works with 3 cell batteries, not included. Measures 22 inches long and around 8 inches tall (varies depending on how he is posed). Made of plastic. Smoke-free.