Mind-stretching activities correlate with the science. The book contains 21 topics, each with background information and writing activities. Among the topics are Microscopes, Rocks, Food Chain, Simple Machines, Astronomy, Volcanoes, Sound, Human Body, Dinosaurs, Magnetism, Weather, Cells, Water Purification, Butterflies, Rainbows, Telescope, Charles Drew, Sally Ride, Oceans, Electricity, and Inertia. Grades 3 to 6.