High school oddballs are Nickelodeon heroes; ‘Gadget’ goes to the Smithsonian and to N.Y.

Viewers can go behind the scenes of the movie “Good Burger� (Nickelodeon, Sunday at 7 p.m.), which is based on Nickelodeon’s popular series “All That.� The comedy is about how two offbeat high school kids, Ed and Dexter (Kel Mitchell and Kenan Thompson), help a no-frills burger joint called Good Burger become a success. For ages 8-12.

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Inspector Gadget is host, guide and comedian on a visit to Washington’s Smithsonian Institution and to the dinosaur exhibit at New York’s Museum of Natural History on Inspector Gadget’s Field Trip (History Channel, Sunday at 7 a.m.). For ages 6 to 11.

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Kids’ WB! goes Hollywood on Saturday. Daffy Duck visits the Warner Bros. Studio searching for movie stars on “The Daffy Duck Show� (8 a.m.). On “Animaniacs,� (8:30 a.m.), a naive woodchuck from Kansas comes to Hollywood in search of stardom. When Lex Luthor escorts Lana Lang, Clark Kent’s good friend, to a star-studded fashion show on “Superman� (9 a.m.), trouble ensues. Later, on “The Sylvester & Tweety Mysteries� (11:30 a.m.), a Bing Crosby-sounding parrot joins Sylvester to capture Tweety, who has “gone Hollywood� and taken on Sinatra-like affectations. For ages 5 to 7.

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“Katie and Orbie� (Disney Channel, weekdays at 9:30 a.m.) is an animated series narrated by Leslie Nielsen. It follows “first-time experiences� of Katie, 5, and Orbie, her pink friend from another planet. During one of Monday’s episode, Katie learns to smack open a pinata during Orbie’s birthday. Another animated series follows the adventures of “Madeline,� the little Parisian school girl (Disney Channel, weekdays at 11:30 a.m.). On Tuesday’s episode, Madeline is able to save the boarding house from the wrecking ball. For ages 2 to 5.