Synopsis: A fast-paced biography of Thomas Edison, the scientist who perfected the light bulb and propelled America into the twentieth century.

Synopsis: Investigate the mysterious forces that affect the earth, using materials found around the house. Build an earthquake detector from a shoebox, pencil, paper, and string. Create a glacier model that melts, moves, and leaves behind sand and rock. Experiment with gravity, magnetism, plants and recycling. All are simple, safe, and guaranteed to work. 128 pages, 30 b/w illus., 5 3/8 x 8 1/4.

Synopsis: "Gr. 3-6...Simple and direct experiments requiring a minimum of materials and expense....Helpful offering."--Booklist. "Appealing...safe."--SLJ. "Nearly a hundred simple science demonstrations that use common household materials....Even the more experienced readers will probably find something new....Recommended."--Science Books & Films. 128 pages, 115 b/w illus., 5 3/8 x 8 1/4.