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Paper Tape Motion Timer
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In this activity, learners build a recording timer made from simple materials (e.g., small dc motor, sharpie pen, craft sticks, adding machine paper tape, etc.).

Cookie Surface Area
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This is an activity (on page 2 of the PDF under Surface Area Activity) about surface area to volume ratio.

Breaking Beams
Learners investigate stress and strain by designing, building, and testing beams made from polymer clay.

Protect That BRAIN!: Mr. Egghead
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This activity demonstrates the importance of wearing a helmet to protect the brain. An egg is used to symbolize a head with the shell as the skull and the inside of the egg as the brain.

Oil Spill Cleanup
This hands-on experiment will provide learners with an understanding of the issues that surround environmental cleanup.

Exploring Bouncing Balls
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Learners explore the physical properties of a variety of balls and how they bounce.

Beachcombing
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In this outdoor activity, learners become beachcombers as they walk on a sandy beach in search of evidence of life.

As the Rotor Turns: Wind Power and You
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In this engineering activity, learners will get acquainted with the basics of wind energy and power production by fabricating and testing various blade designs for table-top windmills constructed from

Bonseki Salt Art
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In this activity learners will be creating art using a traditional Japanese art style.

Space Stations: Measure Up!
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In this activity, learners work in pairs to measure each other's ankles with lengths of string.

The Colors of Flowers
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In this activity, learners perform an experiment to find out what determines a flower's color.

Head in the Clouds
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In this activity, learners create a CloudSpotter wheel and record the different types of clouds they observe twice daily over several days.

Weather Stations: Temperature and Pressure
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In this activity, learners discover the relationship between temperature and pressure in the lower atmospheres of Jupiter and Earth.

Molecules in Motion
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In this activity, learners add food coloring to hot and cold water to see whether heating or cooling affects the speed of water molecules.

Mini Zoetrope
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In this activity (posted on March 27, 2011), learners follow the steps to construct a mini zoetrope, a device that produces an illusion of action from a rapid succession of static pictures.

Designing a Wall
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In this engineering activity (page 5 of PDF), young learners investigate how materials and design contribute to the strength of a structure, particularly walls.

Web It!
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In this outdoor activity, learners investigate spider webs and feeding behavior, particularly how spiders trap food in their sticky silk webs while not getting stuck themselves.

Submersibles and Marshmallows
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In this activity, learners discover the difficulty of ocean exploration by human beings as they investigate water pressure.

Neutralizing Acids and Bases
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Learners use their knowledge of color changes with red cabbage indicator to neutralize an acidic solution with a base and then neutralize a basic solution with an acid.

Copper Cleanup
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In this hands-on experiment, kids use chemistry to explore whether acids or bases are better at restoring a penny’s shine.