"Gr. 5-9. From the discovery of the lodestone...to the use of magnetic technology in the space program, this clearly written book introduces the science of magnets. Throughout, explanations of scientific principles are expanded by activities that demonstrate the concepts. These activities vary from simple to practical to playful to out-of-this-world....A good introduction to magnets."--Booklist. "Gr. 4-9--An extremely useful offering....All activities are well diagrammed, and ample safety instructions are given."--SLJ. "...fascinating hands-on experiments...a well-planned, well-organized book...."--Science Bks & Films -starred review. 128 pages, 100 b/w illus., 5 3/8 x 8 1/4.