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In this activity (located on page 3 of the PDF), learners investigate the way water moves and how we can control and direct water.

Learners observe and compare the sizes of three toy “growing” crocodiles made from water-absorbent polymers. One is it its original state, dry, hard, and about 10cm long.

In this activity, learners design a device to solve a problem: how to get a ball out of a drain pipe.