Peek into the underground world of earthworms and discover their earth-saving secrets! See how they turn waste into soil and dig tunnels to create drainage for plants. Perform experiments to demonstrate how worms live and work underground. Have fun with the “Super Squirmin” character cutouts. Complete kit includes: Double-sided viewing unit with shield & tray (keeps light out–worms in), super-expanding soil wafers, live action experiment booklet and colorful worm cut outs.