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Bat Echolocation
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In this activity, learners investigate how bats use echolocation to navigate. One learner is assigned to be a bat, while the other learners are selected to be either moths or trees.

Frosty Glasses
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In this activity, learners explore why frost forms. They create their own frost using a solution of ice water and salt in a glass.

Bernoulli's Blowout
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In this quick activity (page 1 of PDF under SciGirls Activity: Kites), learners will witness firsthand the effects of Bernoulli’s Principle by capturing a ping pong ball in the stream of air created b

Bubble Suspension
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In this activity, learners observe as soap bubbles float on a cushion of carbon dioxide gas. Learners blow bubbles into an aquarium filled with a slab of dry ice.

Handwriting Analysis
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In this forensics activity, students will explore the methods that investigators use to confirm the authenticity of handwriting.

Low-Tech Water Filter for High-Impact Clean
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In this activity, learners consider the water features they might enjoy at a community park--a pond, brook, water playground (or "sprayground"), or pool--and what happens to the water over time.

Teen Moon: Moon Ooze
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In this activity, learners model how the Moon's volcanic period reshaped its earlier features.

Straw Rockets
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In this activity, learners will create unique rockets. Each rocket will be powered by air as the learner will blow into a straw and watch their rocket fly.

Build a Giant Puzzle!
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In this activity, learners assemble large cubes to make nano-related images. Learners discover how different objects are related to nanoscience and nanotechnology.

Water Engineering
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In this activity, learners will engineer a water irrigation system. Learners will create a ditch irrigation system -- or an acequia-- to move water with the help of gravity.

Balloon Nanotubes Tabletop
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This activity introduces learners to the structure and properties of carbon nanotubes.

Levers at Play
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In this activity, learners consider how a simple machine, a lever, turns a small push or pull (a small force) into a larger--or stronger--push or pull (a larger force).

Let's Bag It
Learners observe and discuss a vacuum cleaner as a model of a baghouse, a device used in cleaning industrial air pollution.

Egg-stra Strength
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In this physics activity, learners will investigate the strength of egg shells.

On the Fringe (formerly Bridge Light)
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In this activity, learners trap a thin layer of air between two pieces of Plexiglas to produce rainbow-colored interference patterns.

Jump to Jupiter
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In this activity, learners help create and then navigate an outdoor course of the traditional "planets" (including dwarf planet Pluto), which are represented by small common objects.

Bug Hotel
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In this activity, learners will create a home for animal friends in their backyard using recycled materials. Some material suggestions include: pine straw and twigs.

Moving and Working in Space
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In this activity, groups of four learners must complete a set of four manual tasks. The restrictions are that they must complete the tasks in a limited time while wearing garden or rubber gloves.

Bridge Building
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This is a quick activity (on page 2 of the PDF under Hockey Sticks Activity) about how the arrangement of carbon atoms determines carbon's different properties.

A Closer Look at Crystals
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In this activity, learners compare different types of salt crystals under a magnifying glass.