Worm Observatory and Habitat- Discontinued. Watch and learn about the fascinating wiggley world of worms! Discover the lifecycle of the Earthworm and learn how to care for them. Earthworms are important for the soil. By digging and tunneling below the surface, they help to mix-up the soil layers by moving air and nutrients around. This great kit includes: Habitat, sand, soil, magnifier, & pipette; Activity and instruction book; Live worm ordering details. Sized at 11 by 11 by 1.5 inches. If you prefer to order by telephone or by fax, click here for more information! Product Number: WORLDA4