Presents information, facts, figures, photographs, charts, and diagrams that explain the science of light and sound, discussing color and brightness, ears and hearing, sound waves, echoes and sonar, lasers and holograms, and other topics.
Presents information, facts, figures, photographs, charts, and diagrams that explain the science of electricity and magnetism, discussing lightning, atoms and electric charge, cells and batteries, electromagnetism, and other topics.