This activity from the Exploratorium contains an introduction to diamagnetic materials like water that are repelled by both poles of a magnet. A rare-earth magnet is used to repel grapes, whose main component is water,...
This Exploratorium site contains an activity about afterimages, the lingering images seen after staring at a particular stimulus. Participants look at bird shapes of different colors for a while and then look away,...
This Exploratorium site provides a demonstration using an ordinary bicycle wheel and rotating stool to show how gyroscopes behave. A person sitting on the stool is turned due to a change in the direction of the axis of...
This activity from the Exploratorium provides a classic science demonstration of the buoyancy of a Cartesian diver, named after scientist René Descartes. A diver made from an eyedropper or Bic? pen is made to float, si...
This site from the Exploratorium contains an activity to demonstrate fatigue of the eyes? motion detectors and the resulting visual illusions. A spiral disk is rotated as the participant stares at it for a few s...
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