Design and build your own robots, RC cars, motors, and more with these prize-winning science fair ideas!

To many people, the thermionic valve or electron tube is history. However, whether it is nostalgia, interest in the technical parameters, the appeal of a gleaming amplifier chassis with softly glowing valves, respect for the technical know-how of an earlier generation, or perhaps the firm conviction that the sound of a valve cannot be bettered, it is a fact that the valve is making a come-back. The book contains, apart from construction projects for preamplifiers, power amplifiers, and two amplifiers for musical instruments, information on the operation of electron tubes, while the first chapter gives a short history of the valve.

Kids and teachers can build their own science projects based on exhibits from San Francisco's premiere science museum This revised and updated edition offers instructions for building junior versions, or "snacks," of the famed Exploratorium's exhibits. The snacks, designed by science teachers, can be used as demonstrations, labs, or as student science projects and all 100 projects are easy to build from common materials. The Exploratorium, a renowned hands-on science museum founded by physicist and educator Frank Oppenheimer, is noted for its interactive exhibits that richly illustrate scientific concepts and stimulate learning. Offers a step-by-step guide for building dynamic science projects and exhibits Includes tips for creating projects made from easy-to-assembly items Thoroughly revised and updated, including new "snacks," images, and references

Boys' Life is the official youth magazine for the Boy Scouts of America. Published since 1911, it contains a proven mix of news, nature, sports, history, fiction, science, comics, and Scouting.

What does the transformation to a visitor-centered approach do for a museum? How are museums made relevant to a broad range of visitors of varying ages, identities, and social classes? Does appealing to a larger audience force museums to "dumb down" their work? What internal changes are required? Based on a multi-year Kress Foundation-sponsored study of 20 innovative American and European collections-based museums recognized by their peers to be visitor-centered, Peter Samis and Mimi Michaelson answer these key questions for the field. The book describes key institutions that have opened the doors to a wider range of visitors; addresses the internal struggles to reorganize and democratize these institutions; uses case studies, interviews of key personnel, Key Takeaways, and additional resources to help museum professionals implement a visitor-centered approach in collections-based institutions