I've been a fan of Bill Nye way before he became a Science Guy...check out an old show called Almost Live! sometime...but he did really good things for science education. Although the skits are sometimes a little dated (see an early mobile phone in one episode, for example), the science is solid and the comedy is real. I've been watching these with my entering-3rd grader who is also an enthusiastic fan. I highly recommend any Bill Nye the Science Guy episode.