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

In this hands-on activity, learners use the steps of the design process to create a hook to rescue a "space capsule" from the water.

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 build water-propelled engines from soft drink cans.