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Trail Construction
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In this highly physical outdoor activity, learners construct and compare experimental trail sections to select the best trail-construction technique for their site.

A Question of Balance
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In this activity, learners explore how engineers use scales and measures when designing a manufacturing process to ensure that final products are uniform in weight or count.

Launch Altitude Tracker
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In this activity, learners construct hand-held altitude trackers. The device is a sighting tube with a marked water level that permits measurement of the inclination of the tube.

Not Just A Bag Of Beans
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In this activity, learners count and measure kidney beans to explore natural selection and variation. Learners measure the length of 50-100 beans.

Making Sense of Sensors
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In this activity, learners explore sensors and focus specifically on how to measure humidity using a sensor.

Equatorial Sundial
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In this activity, learners make an equatorial sundial, which is simple to construct and teaches fundamental astronomical concepts. Learners use the provided template and a straw to build the sundial.

Model Wind Tunnel
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In this activity, learners build a miniature wind tunnel to measure force. Learners construct the model out of Lexan plastic, a fan, and a precise digital scale.

Measuring the Wind
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In this activity, learners explore how anemometers work to record wind speeds and how the equipment has undergone engineering adaptations over time.

Topographic Investigation: Map an Underwater Surface
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In this activity, learners create a map of a hidden surface using a "sounding stick" -- a technique similar to how underwater maps were once made.

Measure the Pressure II: The "Dry" Barometer
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In this activity, learners use simple items to construct a device for indicating air pressure changes.

Exploring Size: Scented Solutions
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This is an activity in which learners will find that they can detect differences in concentration better with their nose (smelling) than with their eyes (seeing).

Hand Biometrics Technology
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In this activity, learners explore how engineers incorporate biometric technologies into products as well as the challenges of engineers who must weigh privacy, security and other issues when designin

How Big is Small
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In this classic hands-on activity, learners estimate the length of a molecule by floating a fatty acid (oleic acid) on water.

Temperature Tactics
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In this activity, learners explore the devices used over time to measure changes in temperature.

There's Always Room For JELL-O
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In this activity, learners cut wells in JELL-O© and load the wells with different detergent solutions.

Out of Sight: Remote Vehicle Activity
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In this robotics activity, learners drive a remote-controlled car through a course to learn the challenges faced while trying to operate a planetary rover.

Weather Vane and Anemometer
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In this meteorology activity, learners construct simple devices to measure the direction and speed of wind.

Delta, Delta, Delta
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In this experiment, learners construct an equilateral triangle using graph paper, a pencil, protractor and ruler. They also make a "laser triangle" using a laser pointer and front-silvered mirrors.

Measure the Pressure: The "Wet" Barometer
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In this activity, learners use simple items to construct a device for indicating air pressure changes.