Smithsonian Prehistoric Sea Monsters Triops Eggs Kit Hatch your own Prehistoric Pets!! Witness a 220- Million year old species come to life and watch these prehistoric sea monsters will grow 20x their original size Includes; 1 Aquarium, 1 background, 1 bag of Triop Eggs, 1 bag of Triops Food, 1 bag of sand and color poster with instructions!