Let me start by saying, I think the show ranks pretty high among children's science shows. The downside, however, is that some of the experiments aren't very practical or accessible to be redone or attempted by children of th suggested audience age range. And the show is so exciting and interesting that your kids will want to try it and be upset that you can't afford 500 gallons of corn syrup or toothpaste. One experiment in particular involved lighting a teabag on fire, so that it would float away and burn up. There's no mention that this is a very controlled experiment and that not all teabags are created equal. Five times at least now I've had to stop my son from wanting to light teabags on fire, and on the same day he saw the episode, we extracted some more thin paper from our toaster that he had stuffed in trying to recreate the experiment after not being able to recreate the one in the show. Do I blame the show? Not exactly, kids develop an interest in fire - but I think that episode in particular was pretty thoughtless about the fire experiment given the age range of the show.
