This summer he has learned a LOT of language from Oobi. The characters speak in only basic sentences (Look! Oobi clean room. Now go outside.) so I think it is easier to pick up what they are saying. He has begun using scripted language from the show. When he wants me to quit folding laundry and play with him, he will take it out of my hand, look at me and say, "Game over". When he wants me to join in with him, he will say, "Oobi sing, you sing. You sing." No matter the activity, he uses that sentence.
I also have a theory about their static eyes and 'faces' being less complicated and more easy for him to understand, but who knows.
From the Noggin.com web site:
Oobi is an original series based on NOGGIN’s own Parents’ Choice Gold Award-winning short-form series. Oobi, a bare-hand puppet (with eyes and accessories) focuses on the stage in a young child’s life when everything in his or her world is new and incredible. Oobi is a show about wonder. It speaks to the stage in a young child's life when everything is new and incredible: building a block tower, making cookies. Oobi is a show about children's first awkward attempts at mastery and meaning. It's a show about the everyday revelations.
Learning Goals: With interactive games and story, Oobi, a curious and gentle four-year-old, discovers the world around him, along with his three-year-old sister Uma, his best friend Kako, and his grandfather, Grampu -- all bare-hand puppets. Through connected learning preschoolers build vocabulary, concepts and skills from mathematics, early literacy and logical thinking as they play.