I think it was in this time error(80s or early 90s)... we used to watch it in school and there were a sister and brother who went on some type of majical adventure w ith 2 furry colorful creatures and bumped in to all kind of other majical stuff and I remember them sliding down a slide?? I know its vauge memories but does any one have a suggetion of what this movie or show it would be?

Sounds like the movie Labyrinth. With David Bowie.