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In this activity, learners explore the different salinities of various sources of water by taste-testing.

In this activity about depth perception, learners create an optical illusion in a shoe box.

Are balloons porous or non-porous? In this activity, learners watch an entertaining Mr. O video and conduct a simple experiment to find out.

This lesson (on pages 15-24 of PDF) explores how sound is caused by vibrating objects. It explains that we hear by feeling vibrations passing through the air.