I find it really creative how expressive they can be with a bare hand as a puppet. Personally, I also like the basic noun-verb language the characters always speak in, since I strongly believe hearing a range (nonsense, baby talk, and proper language) is useful for most young kids in language development. Too much of only one is a problem. I especially like having a live action (rather than animated) show for young kids that is enjoyable. So many are completely annoying and others are just barely tolerable.