Gr 3-6–Students can explore science and engineering concepts through these hands-on activities. Topics include ­circuits, ­erosion, plants, mixtures, and solutions. Each experiment begins with a page of discussion followed by a materials list, step-by-step ­instructions, and a conclusion. A majority of supplies are household items such as food coloring, vinegar, and dish soap. Some activities also have a text box with an explanation of the results. The books all begin with a note to parents and students about safety, as well as a review of the scientific ­method. Full-color photos and ­illustrations, a ­glossary, and suggestions for further ­reading all support student learning. ­VERDICT Very useful for classroom science labs and individual experimentation.