I am currently watching 100 Greatest Discoveries, hosted by Bill Nye (known to millions as "Bill Nye the Science Guy"). Now, my kid loves Bill Nye but she is in bed right now, so I can't give you her opinion. On the other hand, I've been watching Bill Nye since he was a regular guest on Seattle's late night show, Almost Live, and I also count myself a big fan.
Nye makes a great host for what is essentially an overview of science; the eight episodes cover discoveries in the fields of Evolution, Earth Science, Medicine, Physics, Astronomy, Chemistry, Genetics, and Biology. The show uses historical recreation, expert interviews, computer graphics and location shots to give the viewer the best possible introduction to those discoveries and theories which form the basis of modern scientific thought.
It's currently airing in British Columbia on the Knowledge Network, but check your local Discovery Channel or PBS listings in the upcoming weeks and months.
Or, you can pre-order the DVD set from the Discovery Channel.