This science fair book has some neat activities that teachers could do with their classes. A few cool projects that I found included measuring your heart rate after hyperventilating and hypo-ventilating to observe the effect of breathing on heart rate and testing sunscreens on photo-reactive paper to determine which SPF value blocks the most sun rays. The most interesting project that I found predicted how the types of pigments in a green leaf determine its fall color. Early in the school year, students will collect one green leaf from three different trees. Using a rubbing alcohol, a coffee filter and a few other household products, the student can see the alcohol spread up the filter through the pigment. In the fall, once the trees have changed colors, the student will do the entire experiment again and compare the new results to the green leaves. I think this is an awesome project for students, because it is spread out over time. A lot of science projects only take one day, but this project allows students to see a change over a greater span of time, rather than a few minutes or even a few seconds, like other science projects. ( )