Walmart Animated Gemmy Twerking T-Rex Dinosaur Booty Shake This Gemmy Industries Booty Shake Twerking T-Rex Dinosaur is ready to dance its way into your heart! It is sure to bring a smile to anyone's face with his “Booty Shake” Song. He has cool black sunglasses on and a purple shiny shirt. He requires three AA batteries to work, which are not included. He has been tested and works perfectly. His battery compartment is clean and free of any rust. I purchased this at an estate sale and was told that he was displayed and barely played. His tushy tags are intact. He is approximately 13 inches tall.