Finish this tune: Who lives in a pineapple under the sea? If you answered correctly with "SpongeBob SquarePants!" you've likely heard of the square, sponge cartoon who made his TV debut 25 years ago ...

"Nightline" visits the "SpongeBob" studios -- and interviews the Sponge himself. March 26, 2010 — -- Welcome inside the No. 1-rated children's show in all of television. If you're thinking the ...