Have you seen this video for They Might Be Giants' "Meet the Elements"?
It's from their Here Comes Science DVD. We picked up the CD/DVD set at the library, and we've been rocking out to science all day. Well, mainly I've been rocking out to science, and the children have been rolling their eyes at my dancing abilities - but they are great songs! Or, maybe I should say, they are great songs except for "Science is Real" and "My Brother the Ape", which as a Christian, I just found to be an offensive bunch of bunk (catchy tunes, though).
The rest of the songs are terrific. "I Am a Paleontologist", briefly mentions evolution, but it's not in your face, and the rest are straight science. My favorite of all is "Meet the Elements" which I linked above. Of course, you can listen to samples of the other songs, or purchase the DVD, CD, or individual songs at Amazon, or at tmbg.com, but I'd suggest checking with your local library first.
It's great to be a homeschooler.