It's tough to accept this movie's premise. A bunch of kids are given a tour of the Space Shuttle as NASA is testing its engines. An accident happens, and they, along with their guide, are launched into space. Once up there, can they be talked back down?

Add an annoying, seemingly sentient robot into the mix. Add the standard "two dimensional character development" arc, where each member of the cast overcomes his or her single character trait/flaw by the end of the story. Add gobs of sap, gushiness, and boredom. Mix well, and you've got a first class mess.