Because Nick Jr. hasn't had a good mascot since Face. I don't know what they were thinking moving on to something else. Face defined a generation, and just imagine what he could be and do with today's technology and equipment.
Face HD. A re-envisioned, fun, interactive children's learning program, by Nick Jr.
(Also the creepiest desktop wallpaper I think I've ever made...)
Face: Hello?
unknown:YOUWILLNEVERBEBORNYOUWILLNEVERBEBORNYOUWILLNEVERBEBORNYOUWILLNEVERBEBORNYOUWILLNEVERBEBORN!
Face: Aah!