On what network did the television program, that Magnús Scheving played the character of Sportacus on, originally air?
Magnús Scheving:  He was the creator, the director, and an actor on the children's television show "LazyTown", in which he played Sportacus. LazyTown:  The series originally aired on Nickelodeon in the United States, CBeebies in the United Kingdom, RÚV in Iceland.
Nickelodeon