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This activity explores the basic workings of a siphon, which is the core technology that makes toilets work.

In this sunny day experiment, learners measure and compare how quickly light and dark colored materials absorb heat.

Learners act as engineers and design mini submarines that move in the water like real submarines.

Electrolysis is the breakdown of water into hydrogen and oxygen. This Exploratorium activity allows learners to visualize the process with an acid-based indicator.

In this activity, learners play with surprising sand that doesn’t get wet! Learners explore how water behaves differently when it comes in contact with "magic sand" and regular sand.