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In this activity (page 2 of PDF), learners play with a lens and a piece of paper to focus an image on the paper. Learners look at different things, and see how the lenses affect the image.

In this trick, hold your hand over a burning candle without getting burned, by reflecting and transmitting the light of two candles. This activity is best suited as a demonstration.

In this activity (12th on the page), learners investigate their ability to discriminate (see) different colors.

In this activity (17th on the page), learners investigate why you cannot see colors in dim light.