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Building Houses: Build a Cardboard Tube House
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Build a house you can fit inside, using cardboard tubes.

Sand Castle Saturation
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In this activity about saturation (page 1 of PDF under SciGirls Activity: Sand Dunes), learners will build a series of sand castle towers using a 16 oz cup.

Round & Round
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In this activity, learners make and test fly paper helicopters. Learners use templates to create paper helicopters and then take take turns flying them in the air.

Carbon Sequestration
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In this inquiry-based lesson, learners measure the biomass of trees, calculate the carbon stored by the trees, and use this information to create recommendations about using trees for carbon sequestra
Giant Museum: Create a Scale Model
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In this activity, learners will predict the size of a giant scale model of a comb or other rectangular object, then make one. If you tripled the size of a dollar bill, could you sit on it?

The Shadow Knows II
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In this activity, learners will measure the length of a shadow and use the distance from the equator to calculate the circumference of the earth.

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.
Double or More
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Choose a recipe to double (or triple, quadruple, or halve). Show everyone the recipe and engage them in figuring out: How much will we need to increase the recipe to feed everyone?

Water Walk
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Learners take a field trip along a local body of water and conduct a visual survey to discover information about local land use and water quality.

Geometry and Spatial Relations: Sidewalk Capers
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In this math lesson, learners use a variety of manipulatives to explore spatial relationships of squares and their transformations.

Number Sense and Computation: Soak It Up
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In this math lesson, learners compare products to determine the best product.

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.

Ping Pong Ball Shooter
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In this activity, learners use ABS pipe and an air leaf blower to make a strong shooting machine.

Newton Car
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In this activity, learners work in teams to investigate the relationship between mass, acceleration, and force as described in Newton's second law of motion.

Using a Sundial
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In this activity (on page 12 of the PDF), learners make a sundial (shadow clock) appropriate for their geographic location in the northern hemisphere and use it to tell time.

Using Ohm's Law to Build a Voltage Divider
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In this activity, learners apply Ohm’s Law to construct voltage divider circuits. Learners discover how to read resistor codes and calculate resistor values.

Rocket Wind Tunnel
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In this activity, learners evaluate the potential performance of air rockets placed inside a wind tunnel.

Computation and Estimation: Roll Out The Barrel
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In this math lesson, learners apply mathematical modeling to solve a real-world storage problem, in which a manufacturing company is given two options for storing oil barrels.

Lift Off!
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This activity (on page 2 of the PDF under SciGirls Activity: Lift Off) is a full inquiry investigation into the engineering challenges of sending scientific sensors into space.
Look Around: Hunt For Sizes, Shapes and Numbers
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In this activity, learners will participate in a scavenger hunt involving sizes, shapes, and numbers. This activity works well with a whole group, individuals, or families.