Tóm tắt nội dung: Who says the Science Fair has to end? If you love building gadgets, this book belongs on your radar. Here are complete directions for building ten cool creations that involve light, sound, or vibrations -- a weird microphone, remote control gizmos, talking toys, and more, with full parts and tools lists, safety guidelines, and wiring schematics. Check out ten cool electronics projects, including - Chapter 8 -- Surfing the Radio Waves (how to make your own radio) ...