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Information Hiding: Sharing Secrets
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This activity about cryptographic techniques illustrates a situation where information is shared, and yet none of it is revealed.
Soil Secrets
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In this activity (located at the bottom of the page), learners investigate soil and explore the creatures that live in it.

Draw a Monarch Butterfly: Scientific Illustration
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Ivy Rutzky, a scientific assistant at the American Museum of Natural History, introduces an activity where learners create a scientific illustration of a monarch butterfly.

Boats Afloat
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In this activity, learners discover what buoyancy is and determine the characteristics that make an object buoyant. Learners design, build, test, and evaluate boats made from a variety of materials.
Quick Questions: Learn About Data
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In this activity, learners will collect and analyze data to learn about the people around them. How many letters in everyone’s first name? What’s the most common number of letters?

Apples with Appeal
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In this activity, learners investigate why apples turn brown. Learners discover that lemon juice interferes with the reaction that causes the browning.

Mystery Number
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Combine logic and numbers in this game for all ages. Players start with a 10x10 grid of the numbers 1 to 100. One person chooses a secret number and announces the range in which it falls.

Exploring Forces: Gravity
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In this nanoscience activity, learners discover that it's easy to pour water out of a regular-sized cup, but not out of a miniature cup.

Design a Parachute
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After a discussion about what a parachute is and how it works, learners create parachutes using different materials that they think will work best.

Dinosaur Count and Sort
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In this activity, learners sort and count different colored plastic dinosaurs by various attributes including tail length, whether or not the dinosaurs have horns, etc.

Water on the Move: Wind and Waves
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In this simple activity, learners explore ocean waves. To find out if water moves forward toward the shore, learners create waves in a simulated ocean (small aquarium tank of water).

Alike and Different
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This activity (on pages 7-13) has pairs of learners survey an array of similarities and differences between them.

Nature Drawing
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In this family or group activity, learners create a nature journal by visiting a local nature center or backyard, observing creatures in their natural habitats, and sketching what they see.

What's in a Penny?
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In this chemistry activity, learners use chemical reactions to observe the composition of an alloy.

Milk Carton Boats
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This activity (on page 2 of the PDF SciGirls Activity: Milk Carton Boat) is a full inquiry investigation into boat hull design.

Traveling Networks
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In this geometry activity, learners explore networks painted on playgrounds, such as a four square court, and draw their own.

Keep a "SLOG" (Sleep Log)
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In this activity (1st on the page), learners keep a "SLOG" or Sleep Log to study their sleep patterns.

Make a Model of a Home Made From Shipping Containers
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In this activity, learners watch a video to learn about a couple who built a home out of shipping containers in Brooklyn, New York.

Balloon Kebabs
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In this demonstration, learners observe the effects of density and pressure by attempting to make "balloon kebabs." Learners will try to insert a wooden skewer all the way through an inflated balloon

Delicious Smelling Chemistry
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In this activity, learners use household materials to investigate and explore their ability to smell an odor.