- These are our best-selling hatch'ems in larger sizes! - Place in water and watch the plastic egg gradually crack open over a period of 48 hours. - The endearing and durable creature is revealed as it grows! - This assortment features a dinosaur in a black and white crackled egg. Includes: 6 hatch’ems Display: 11.5”W x 7”D x 12”H Box: 3.75”W x 3.25”D x 5.25”H Products marked with the STEAM tag are designed to spark children's interest in Science, Technology, Engineering, Art, or Math, and grow their cognitive skills in these areas. Kids | Children | Education | Enrichment | Nature | Wildlife | History | Souvenir | Museum | Adventure | Archaeology | Geology