Science Snacks

The Exploratorium, a museum of science, art, and human perception located in San Francisco, California, makes available for public use Science Snacks, hand-on science activities that can be built at home or in the classroom using cheap and easy to procure materials.  

These activities provide step-by-step directions, photos, video, lists of materials, assembly instructions, etc. They also indicate if adult help is needed and in many cases offer additional information about the explorations. 

You can search for activities alphabetically or by subject.

http://www.exploratorium.edu/snacks