Beware, a T-Rex approaching the volcano... theres a risk of explosion ! Rumble, boom, crash! The Dinosaur Erupting Volcano is about to blow. Create epic prehistoric adventures by integrating this dinosaur themed playset and figures into your BRIO World layouts. Wake the volcano by pressing the small button on its peak activiating glowing lava lights, volcano sounds and safe to touch steam effects that bloom from the volcano vent. Then watch the volcano explode open as the T-Rex stands proudly at the top, overlooking its kingdom. 2 AA batteries required (not included).