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Screaming Balloon
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In this quick activity (page 1 of the PDF under SciGirls Activity: Extreme Sounds) about sound vibrations, learners will investigate which small objects, such as coins, hex nuts, or marbles, produce t

Vibrant Cords
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In this activity, learners will explore how the voice works and feel the vibrations produced by vocal cords.

Crawdad Grab
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In this outdoor, freshwater activity, learners explore the behavior and food preferences of crawdads (or crabs) by "fishing" for them with various baits.

Iridescent Art
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This is a quick activity (on page 2 of the PDF under Butterfly Wings Activity) that illustrates how nanoscale structures, so small they're practically invisible, can produce visible/colorful effects.

Film Canister Farming
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In this hands-on botany activity, learners sprout vegetables in film canisters.

Fossils: Observing, Making and Learning
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In this activity, learners explore how casts of fossilized bones are created and used to learn about dinosaurs. Learners make observations, draw diagrams and share their findings.

Saldo Island: An Unfair Game
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In this environmental science activity about biodiversity, learners play a game to discover the effects of non-native species on an ecosystem.

How Quick Are Your Responses?
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In this activity (on page 134 of the PDF), learners explore reaction time.

Straw Kazoo
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In this activity, learners make some music by constructing a kazoo out of a simple plastic drinking straw. Use this activity to explore sound, vibrations, and music.

Counting With Quadrants
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Millions of organisms can live in and around a body of water.

Lung Capacity
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This is an activity about lung capacity. Learners will measure their own lung capacity using a homemade spirometer.

Whale Communication Hide and Seek
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In this activity, learners pretend that they are orcas and search for their "pods" using Morse code.

Why Doesn’t the Ocean Freeze?
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In this activity, learners explore how salt water freezes in comparison to fresh water.
Growing Plants: Track Their Growth
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In this activity, learners will be working with predictions with a time frame of one week, or longer. Start by planting seedlings.

Water Sphere Lens
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In this activity about light and refraction, learners make a lens and magnifying glass by filling a bowl with water.

Metamorphosis Matching
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This is an activity where learners will compare the different metamorphosis stages of amphibians.

Seeing Your Retina
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In this quick optics activity, learners use a dim point of light (a disassembled Mini MagLite and dowel set-up) to cast a shadow of the blood supply in their retina onto the retina itself.

Cover Your Mouth
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In this health activity (page 3 of the PDF), learners will discover why covering their mouth and nose while sneezing is so important.

Do the Mystery Samples Contain Life?
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In this activity (on pages 13-16 of the PDF) learners investigate three mystery samples to see which one contains life. The three samples are sand, sand and yeast, and sand and antacid.

Homemade Butter
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In this activity, learners will turn cream and salt into butter—using marbles. Learners will explore how shaking up fat globules help them create homemade butter.