Learn with us online while the Exploratorium is temporarily closed. You can help us reopen—donate today.
At this simple but ever-popular exhibit, black sand from nearby beaches make spiky patterns that reveal the invisible magnetic field between the poles of two giant magnets.
Where: Ray and Dagmar Dolby Atrium
"Clouds" of iron particles dart and dance in a magnetic field.
Where: Gallery 2: Tinkering
(Embarcadero at Green Street)
San Francisco, CA 94111
Get at-home activities and learning tools delivered straight to your inbox