Jurassic World Volcano Eruption Kit comes with 10 dinosaurs, 4 trees, 3 rock formations, and 1 mini egg. A large mystery dinosaur egg is included in the larger kit. Pour water into the top and turn on the switch to create steam. By creating a dinosaur world with the pieces given, this encourages creativity, imagination, and fine motor skills. Made of plastic, this kit is recommended for ages 5 and up! Three AAA batteries are required for the volcano to light up and produce steam.