I watched this with my 6-year-old and we turned it off about 15 minutes into the show. Bill Nye speaks to the kids viewing as though he is talking to children with a mental disability. The whole show is filled with pointless experiments, unclear explanations about why things happen in nature, and unfunny jokes. It is definately educational, but very boring. A better way to teach your kids about science would be to take a family day trip to a free science museum. There are great ways out there to educate your kids about the wonders of science...but this is not one of them.
Bill Nye in general is a great way to educate kids on science and get them wanting to learn in general.
I'm 18 and still watch Bill Nye and still learn things from him. His experiments and easy explanations not to added humor and skits all help learning stuff less boring.
He's also very hands on and encourages young viewers alike, with parents of course to engage in experiments with him for better grasping of stuff.