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Players take turns adding shapes made of three squares to a grid. They try to fit their shapes on the grid in a way that blocks the other player.

free Ages 4 - 14 10 to 30 minutes
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In this activity, learners explore their eye pupils and how they change.

free Ages 8 - 14 10 to 30 minutes
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In this optics activity, learners experiment with polarizers (small dark rectangles) to examine light intensity.

free Ages 8 - 14 10 to 30 minutes
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In this quick activity, Dracula has a hole in his house and learners help solve the problem by using a mirror and protractor to reflect incoming light out of his house.

free Ages 8 - 18 Under 5 minutes
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In this optics activity, learners use glass and water to demonstrate total internal reflection (TIR).

free Ages 8 - 14 Under 5 minutes
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In this activity, learners investigate how bats use echolocation to navigate. One learner is assigned to be a bat, while the other learners are selected to be either moths or trees.

free Ages 6 - 14 10 to 30 minutes
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In this activity, learners use a laser pointer, empty soda bottle, rubber plug and water to demonstrate total internal reflection.

free Ages 14 - 18 5 to 10 minutes