Watch FETCH! with Ruff Ruffman (2006– ) full episodes online.
Synopsis: A reality game show with animated host Ruff Ruffman features real kids facing real challenges. The cast of six young contestants are unscripted and never know what task they'll be asked to complete next. Lessons revolve around science, math and just about anything you can think of, and prizes are awarded to the person who best completes the challenges and quizzes.
Stars: Jim Conroy, Rosario Corso, Bethany Owens
More information: IMDB, Wikipedia
P/s: In this series, we miss a lot episodes.