My ds7 also likes Cyberchase. LOVES Wild Kratts and FETCH! He was not into Fetch! until about a year or two ago.
Most of ds' screen time is also spent on PBS kids these days. Dinosaur Train and Curious George were previous faves.
Also dissapointed with Sid the Science Kid and Super Big Fan of Magic School bus (books and tv show).
Other non-pbs shows ds watched @ age 3/4/5 (and we still watch sometimes*):
*Backyardigans! (one of MY favorites)
*Land b4 time
Animalia
Wonder pets
Bill Nye
Dora/Diego
Handy Manny
Disney play house (Mickey/Minnie/Goofy/Donald)
Imagination Movers
Little Bill
Bob the Builder
Thomas the tank engine
Blues Clues
*Veggie Tales
