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A Walk Through the Gut
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This simulation helps learners understand what happens to food as it passes through the digestive system.

Scientific Measurement Exercise
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Learners measure irregularly shaped bones using a variety of measurement methods and tools. Then, they measure again using standard conventions and metric tape measures.

Yeast DNA Extraction
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This laboratory exercise is designed to show learners how DNA can easily be extracted from yeast using simple materials.

Hot Stuff!
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In this activity, learners discover that sand is the major ingredient in glass.

Scram or Freeze
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In this outdoor activity and animal-role-play game, learners discover and uncover the hidden world of "cryptozoa"—organisms such as spiders, salamanders and slugs that live under objects, like rocks a

Invent on the Spot
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In this activity, learners design a device to solve a problem: how to get a ball out of a drain pipe.

The Ladder of Life
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In this activity, learners identify the DNA base bars guanine, cytosine, thymine and adenine. Learners create a DNA model using colored paper clips to resemble these base pairs.

Cabbage Juice Indicator
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In this chemistry activity, learners make indicator solution from red cabbage. Then, learners test everyday foods and household substances using the cabbage juice indicator.

Damsels and Dragons
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In this outdoor activity/field trip, learners conduct experiments to explore where dragonflies and damselflies perch or rest, and how the flies change behavior in reaction to other flies or fly decoys

Automotive Emissions and the Greenhouse Effect
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In this activity about global climate change, learners will conduct an experiment and collect data to compare the amount of carbon dioxide (CO2) in four different sources of gases.

Invisible Investigations
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Using indirect observational methods, learners distinguish between charged and uncharged objects.

Observing Cells
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In this playful activity, learners explore the structure of the cell—the basic unit of every living organism—by creating a model of cell structures using soap bubbles, and by examining a slice of onio

Cool It
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In this outdoor activity/game, learners use thermometers to simulate how lizards survive in habitats with extreme temperatures.

Mystery Marauders
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In this outdoor, mystery-solving activity, learners work like detectives, gathering evidence to identify the culprits that are attacking plants.

Building A Storm Drain
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In this design challenge, learners design a storm drain cover that catches litter to protect waterways to learn about how local actions can have system-level effects.

Floating and Falling Flows
Learners create beautiful fluid motion. They explore fluid dynamics, surface tension, solubility, and buoyancy while mixing liquids together.

Cleaning Water with Dirt
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In this activity on page 7 of the PDF (Water in Our World), learners make their own water treatment systems for cleaning water.

Testing Vitamin C: Chemistry's Clear Solution
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In this activity on page 8 of the PDF, learners investigate vitamin C. Learners conduct a chemistry experiment to determine if Tang drink mix or orange juice contains more vitamin C.

Scent Tag
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In this matchmaking activity (on page 2 of the PDF under GPS: Animal Scent Activity), learners will each have a scented cotton ball taped to their shoulder. The scent (e.g.

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.