Edu Science Do & Discover Prehistoric Sea Monsters Kit Includes aquarium with lid, triops eggs, food, sand, backdrop and poster Raise prehistoric creatures in your own aquarium with this cool kit. Triops hats from eggs in 2-4 days and grow to be about 1 inch long Detailed instructions, plus educational poster with facts and info about triops Aquarium dimensions: 8.25 x 5 x 2 inches