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Modeling Day and Night
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In this activity (on page 1 of the PDF), learners make a "mini-globe" to investigate the causes of day and night on our planet.

Tiny Tubes
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In this activity, learners make "totally tubular" forms of carbon. Learners use chicken wire to build macro models of carbon nanotubes.

Avalanche
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In this geology activity, learners create a model using a mixture of salt and sand inside a CD case. When the case is tilted or inverted, the mixture dramatically sorts into a layered pattern.

Hull Engineering
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In this activity, learners explore how the hull shape impacts a ship's performance and stability.

Fan Cart
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If a sailboat is stranded because there is no wind, is it possible to set up a fan on deck and blow wind into the sail to make the boat move?

Jam Jar Jet
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In this activity, learners create a "Jam Jar Jet" based on Francois Reynst's discovery of a pulsejet engine, which uses one opening for both air intake and exhaust.

Modeling Limits to Cell Size
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This investigation provides learners with a hands-on activity that simulates the changing relationship of surface areas-to-volume for a growing cell.

Water Clean-up
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This is an activity (located on page 3 of the PDF under Water Clean-up Activity) about the use of reduction agents to decontaminate ground water.

Atoms and Matter (3-6)
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In this activity, learners build models of atoms and molecules, then consider their role in different phases of matter, density, and mixtures and solutions.

Space Stations: Bones of Contention
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In this activity, learners make models representing bones on Earth and bones that have been in space. They discover what happens to bones without proper exercise and nutrition.

Landing the Rover
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In this team design challenge (page 19-24 of PDF), learners "land" a model Lunar Rover in a model Landing Pod (both previously built in activities #3 and #4 in PDF).

Electric Paddle Boat
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In this activity, learners build an electric two-paddle boat using paint paddles, plastic knives, and empty water bottles.

Sled Kite
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In this activity, learners build a sled kite that models a type of airfoil called a parawing.

Going for a Spin: Making a Model Steam Turbine
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In this activity, learners explore how various energy sources can be used to cause a turbine to rotate.

The Pull of the Planets
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In this activity, learners model the gravitational fields of planets on a flexible surface.

Space Stations: Sponge Spool Spine
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In this activity, learners simulate what happens to a human spine in space by making Sponge Spool Spines (alternating sponge pieces and spools threaded on a pipe cleaner).

Strengthen a Paper Bridge
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In this quick activity (page 1 of the PDF under SciGirls Activity: Tug O' War), learners will test how many pennies a flat paper index card bridging the gap between two stacks of books is able to supp

Bottle Cars
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In this activity, learners explore motion, energy, and electricity by constructing bottle cars that run on motors.

As Straight as a Pole
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In this engineering activity (page 3 of PDF), young learners investigate how a pole can be made stable by “planting” its base in the ground or adding supports to the base.

Rooftop Gardens
How does a green roof, or roof covered by plants, affect the temperature of the inside and outside of a building? Learners design and build houses to find out the answer.