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In this activity, learners explore work, forces, simple machines, and construction. This lesson guide includes simple ways to demonstrate these principles as well as hands-on activities.

$1 - $5 per group Ages 4 - 8 1 to 2 hours
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In this activity, learners will make predictions and experiment with different objects to see if they sink or float.

1 cent - $1 per group Ages 4 - 6 10 to 30 minutes
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How much can you do in one minute? In this activity, learners estimate how many times a partner can complete a task (like writing their name or jumping jacks) in one minute.

free Ages 4 - 8 10 to 30 minutes
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In this "Sid the Science Kid" activity from Episode 107: My Shrinking Shoes, learners observe how plants change as they grow.

$5 - $10 per group Ages 4 - 6 1 to 4 weeks
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In this activity (2nd activity on the page), learners explore the sensitivity of their sense of touch.

$1 - $5 per group Ages 4 - 18 5 to 10 minutes
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In this activity, learners build bridges out of newspaper and tape to explore how structures are designed to bear loads.

1 cent - $1 per group Ages 4 - 11 2 to 4 hours
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In this activity (7th activity on the page), learners use their sense of touch to identify mystery objects hidden in socks.

free Ages 4 - 18 5 to 10 minutes
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In this craft activity, learners will recognize, name, and compare the fractions 1/2, 1/4, and 1/8 by constructing a penguin out of portions of paper circles.

$1 - $5 per group Ages 4 - 11 30 to 45 minutes
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In this activity, learners work together to make polygons (many-sided shapes) with string. Learners sit on the floor and hold onto a piece of string slid between their thumbs and index fingers.


1 cent - $1 per group Ages 4 - 8 30 to 45 minutes