Following the step-by-step instructions, a child can learn to make an air-screw, mariner's compass, simple siphon, pinhole camera, thermometer, invisible ink, simple electric motor, periscope, boomerang, 3-D viewer, and many other interesting things. The exercises and demonstrations also show how to burn steel, find a center of gravity, make a vacuum with a radish, electrify a bubble, reflect sound, make water denser, compress air under water, carry a column of water, make a liquid sandwich, watch a pulse at work, etc. Each article gives some background information along with an explanation of why the experiment works the way it does.
Over 100 photographs show children performing the experiments, and numerous line drawings depict the materials used, the set-up of equipment, and the desired result.
Following the step-by-step instructions, a child can learn to make an air-screw, mariner's compass, simple siphon, pinhole camera, thermometer, invisible ink, simple electric motor, periscope, boomerang, 3-D viewer, and many other interesting things. The exercises and demonstrations also show how to burn steel, find a center of gravity, make a vacuum with a radish, electrify a bubble, reflect sound, make water denser, compress air under water, carry a column of water, make a liquid sandwich, watch a pulse at work, etc. Each article gives some background information along with an explanation of why the experiment works the way it does.
Over 100 photographs show children performing the experiments, and numerous line drawings depict the materials used, the set-up of equipment, and the desired result.
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