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Conductivity Meter
The ExploratoriumAdd to list DetailsIn this activity, learners build a simple qualitative conductivity tester with a battery, bulb and foil. Then learners use the device to test if a solution, a series of solutions, and a solution...
Aluminum-Air Battery: Foiled again!
The ExploratoriumAdd to list DetailsConstruct a simple battery that's able to power a small light or motor out of foil, salt water, and charcoal. A helpful video, produced by the Exploratorium, guides you along on this activity.
Seeing Your Blind Spot
The ExploratoriumAdd to list DetailsThis activity (aka "snack") provides instructions for discovering your blind spot. It is an exploration of light and visual perception using simple materials you may have around the house.
Kosher Dill Current: Make Your Own Battery!
The ExploratoriumAdd to list DetailsThis is an activity that demonstrates how batteries work using simple household materials. Learners use a pickle, aluminum foil and a pencil to create an electrical circuit that powers a buzzer....
How to View a Solar Eclipse
The ExploratoriumAdd to list DetailsThis is an activity to do when there is a solar eclipse! Eclipses do not happen frequently, but when one does, learners will be excited to discover that they can view the eclipse using a pinhole...
Seeing Your Retina
The ExploratoriumAdd to list DetailsIn this quick optics activity, learners use a dim point of light (a disassembled Mini MagLite and dowel set-up) to cast a shadow of the blood supply in their retina onto the retina itself. This...
Personal Pinhole Theater
The ExploratoriumAdd to list DetailsHave you ever heard of a camera without a lens? In this activity, learners create a pinhole camera out of simple materials. They'll see the world in a whole new way: upside down and backwards!...
Stripped-down Motor
The ExploratoriumAdd to list DetailsIn this activity, you'll make an electric motor--a simple version of the electric motors found in toys, tools, and appliances everywhere. The activity includes three short online videos:...
Simple Spinner
The ExploratoriumAdd to list DetailsIn this activity, learners create a tiny electric, motorized dancer. Learners use the interactions of magnetism and electric current to make a wire spin, while displaying the Lorentz Force in...
The Crayon Rock Cycle
The ExploratoriumAdd to list DetailsIn this activity, learners use crayons to draw conclusions about rocks and the rock cycle. Learners form crayons ((which can be "weathered"—heated, compressed and cooled—like rocks) into...