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

Learners design, build, and test models of "dragon boats" made from up to three milk cartons.

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

In this activity, learners explore how engineering has developed various means to remove impurities from water.

In this activity, learners build water-propelled engines from soft drink cans.

In this outdoor activity, learners race small boats, made of cork, balsa wood, popsicle sticks etc., to investigate the rate and direction of currents in a stream or creek.

In this activity, learners use the design thinking process to design and build their own aqueduct, or water bridge.

In this activity on page 7 of the PDF (Water in Our World), learners make their own water treatment systems for cleaning water.

In this physics activity (page 10 of the PDF), learners will explore how energy from moving water can be used.