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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
Soaring Towers: Building with Recycled Materials
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In this activity, learners will build the highest tower they can out of recycled materials.

Pressing Pressure
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In this activity, learners compare water pressure at different depths. Learners discover that water pressure increases with depth.

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.

Spectroscope
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In this activity (posted on March 12, 2011), learners follow the steps to construct a spectroscope, a tool used to analyze light and color.

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.

Liquid Crystals Interact with Light!
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In this two-part activity, learners explore the properties of liquid crystals, which are responsible for why mood rings change color.

Paper Airplanes
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In this activity, learners explore the properties of paper by constructing and modifying paper airplanes.

3...2...1 Puff!
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In this activity, learners build small indoor paper rockets, determine their flight stability, and launch them by blowing air through a drinking straw.

Solar Cell Simulation
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In this activity, learners model the flow of energy from the sun as it enters a photovoltaic cell, moves along a wire and powers a load.

Build a Raft
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In this activity, learners explore density and buoyancy as they design and construct rafts.

Weather Forecasting
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This activity (on page 2 of the PDF under SciGirls Activity: Forecasting) is a full inquiry investigation into meteorology and forecasting.

Zero-Energy Housing
In this activity, learners investigate passive solar building design with a focus solely on heating.

Ready, Set, Fizz!
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In this activity, learners explore the chemical reaction between water and effervescent antacid tablets. This hands-on activity models how a material can act differently when it's nanometer-sized.

Rainbow Film
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In this activity, learners use clear nail polish to create a beautiful iridescent pattern on black paper. Learners discover that a thin film creates iridescent, rainbow colors.

Make a Human Scale Ladder
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In this quick activity about size and scale (on page 2 of the PDF under What's Nano?

Fingerprint Identification
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In this activity (on page 2) about fingerprint analysis, learners use graphite from a pencil and scotch tape to capture their fingerprints.

Fun with Bernoulli
Learners conduct four simple experiments to demonstrate the effects of air pressure.

The Muddy City: Minimal Spanning Trees
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In this puzzle, learners investigate the decisions involved in linking a network between houses in a muddy city.