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This is a simple activity fully driven by imagination. Using materials from the home, toys, or items from nature, learners create their own world to play with.

free Ages 4 - 8 30 to 45 minutes
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In this multi-part activity learners examine non-point water pollution.

free Ages 6 - adult
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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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The learner will ask yes-no questions to identify a secret shape (similar to Twenty Questions). Build understanding of shapes and logic skills with this game for all ages.

free Ages 4 - 8 5 to 10 minutes
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In this activity, learners will use Google Sky to observe features of the night sky and share their observations.

free Ages 4 - 11 10 to 30 minutes
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In this activity, learners discover how to determine the distance to a lightning strike or nearby thunderstorm.

free Ages 6 - 14 5 to 10 minutes
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This simple, yet surprising physics demonstration challenges preconceptions about forces, and demonstrates the strength of atmospheric pressure.

free Ages 4 - adult Under 5 minutes
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As learners play this strategy game, they develop understanding of squares, area, and perimeter. On each turn, a player draws a line between two dots next to each other on the grid.

free Ages 4 - 14 10 to 30 minutes
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In this activity, young learners will explore shapes, textures, and geometries using household materials.

free Ages 4 - 8 10 to 30 minutes
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In this activity, learners use number sense and mental math strategies to estimate the price of a sign.

free Ages 6 - 11 10 to 30 minutes
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In this activity, learners will rate the day, a book, or something else on a scale from -2 to 2. This activity works well for groups of all ages.

free Ages 4 - 14 5 to 10 minutes
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In this design challenge, learners will practice empathy and design thinking skills by creating an invention of the future.

free Ages 6 - adult 10 to 30 minutes
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In this activity (on page 2), pairs of learners create an imaginary crime scene. One person leaves the room while the other person moves a few things around.

free Ages 6 - adult 5 to 10 minutes
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This is an activity which will allow learners to gain an understanding of lemur behavior through observation and role play.

free Ages 6 - 14 10 to 30 minutes
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In this online Flash game, learners will explore a coral reef using an underwater remotely operated vehicle (ROV).

free Ages 6 - 14 5 to 10 minutes
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In this game-like activity (5th activity on the page), learners explore their auditory acuity as well as the importance of having two ears.

free Ages 4 - 11 5 to 10 minutes
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In this activity, learners will go outside and create a constellation.

free Ages 4 - 8 10 to 30 minutes
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In this activity about gravity (page eight of the pdf), learners will very simply explore how gravity affects objects using balls and toys.

free Ages 4 - 8 10 to 30 minutes
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In this activity, learners use their imaginations and picture a scene in their heads.

free Ages 6 - 14 10 to 30 minutes
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In this activity, learners will explore how the voice works and feel the vibrations produced by vocal cords.

free Ages 6 - 11 10 to 30 minutes