Friends of ours gave us a microscope kit and the boys had a great time looking at the slides that came with it and examining anything else they could find that would fit. Leaves, money, drawings, etc. I don't have any pictures as I was feeling rather punkish w/a huge headache which has evolved into full blown cold.
They are also building a wooden car kit, which I will take pictures of once it's finished. The good thing about homeschooling. Even if the teacher is sick, the kids can find educational stuff to do!