Provides instructions for making such devices as a tin-can telegraph, crystal radio, and kaleidoscope, and suggests a variety of related experiments and other activities.It will take about 45 minutes to cook up your own sun-powered ovens. YOU WILL ... No one wants a roasted kid for lunch, so wear sunscreen when youa#39;re outside for long periods on a bright summera#39;s day. (And dona#39;t be ... solar cookers and then have a marsh- mallow-roasting race to see which one works fastest. For the firstanbsp;...
|Publisher||:||Gareth Stevens Pub - 1993-01-01|