My girlfriend put me onto Bill Nye the science guy and my girls (7 and 4) love it!!! What I like about it is that it leads to lots of questions, research and experiments - so much so that my bath tub is full of growing projects! The shows are short-ish in duration (about 30 mins) and there's one on almost every subject so it's a great way to kick-start a line of inquiry...

jojo