"Umeko and Kuwa" is a Japanese story read by Hiroshi to Bob and the kids on Sesame Street, with Oscar and Slimey listening in. It's the tale of Umeko, a little girl who has a silkworm named Kuwa for a pet. Her friends sometimes make fun of her for having a pet worm rather than a dog or a cat. Sesamestreet.org lists the skit as "The Story of Umeko and Kuma."