Science Documentaries for Youngsters?

An anonymous reader writes "My 7-year-old daughter is asking some interesting questions, such as, 'How did everything get created?' I've explained, in general terms, our family's non-religious views on the subject of creation and the Big Bang. I'd like to find some documentary videos geared to this age level that may explain better these concepts and theories. I've found a few PBS specials online - Stephen Hawking stuff - but they seem to be geared for young adults and older. Does anyone have recommended titles that might be better geared to children of this age bracket?"