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In this activity about light, learners explore how water can refract light and change the way they see things.

In this optics activity, learners explore color by examining color dots through colored water and the light of a flashlight.

In this math activity related to light, learners assemble a photometer and use it to estimate the power output of the Sun.

In this activity, learners use a flashlight, a glass of water, and some milk to examine why the sky is blue and sunsets are red.

In this activity, learners use earthworms as "unknown creatures" from the South American jungle to find out how animals use senses.