Not since "Pee-Wee's Playhouse" has a so-called children's series enjoyed such cross-over appeal with college students and adults. Take the plunge and join the fun in the undersea world of Bikini Bottom, where lives yellow and porous SpongeBob. This setcontains all 40 absorbing episodes from the first season, as well as 90 minutes of behind-the-scenes features, music videos, and "Krusty Kab Karaoke."