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Build A Treetop Walkway
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Build and test a scale model of a rainforest canopy walkway.

DNA Extraction from Wheat Germ
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DNA is the thread of life. Encoded in its genetic sequence is the information that makes each of us unique. This activity allows you to see long, stringy strands of DNA extracted from wheat germ.

Above Water: Buoyancy & Displacement
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In an investigation called "Shape It!" learners craft tiny boats out of clay, set them afloat on water and then add weight loads to them, in order to explore: how objects stay afloat in water; what th

Clap Sensor: Build a Sound Sensor Using a Pico Cricket
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This activity requires a Pico Cricket (tiny computer). Learners work on designing and building a sound sensor out of household materials, like plastic wrap and cardboard.

The Great Plankton Race
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In this activity, learners are challenged to design a planktonic organism that will neither float like a cork nor sink like a stone.

Exploring Size: Scented Balloons
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In this activity, learners use their sense of smell to explore the world on the nanoscale.

Strong Bones, Weak Bones
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Most people will break a bone in their body at some point in their life, but how much force does it take to break one?

Animal Scent
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This activity (on page 3 of the PDF under GPS: Animal Scent Activity) is a full inquiry investigation into animal behavior.

Tabloid Science
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In this activity, learners analyze a fictionalized report of life on Mars, based on a real NASA satellite photo, and explore how to separate scientific fact from fiction.

Coupled Resonant Pendulums
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In this activity, learners discover that two pendulums suspended from a common support will swing back and forth in intriguing patterns, if the support allows the motion of one pendulum to influence t

Quipus
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Learners create an Incan counting device called a quipu (pronounced kee-poo).

What's in the Water?: Biotic and Abiotic Elements in Aquatic Ecosystems
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In this investigation learners explore the differences between, and interdependence of, living and nonliving elements in a water ecosystem.

Solar System in My Neighborhood
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In this activity, learners shrink the scale of the vast solar system to the size of their neighborhood.

Wind Works!
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Learners will build and experiment with their own windmills made from simple household materials.

Investigating the Line
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In the related activity called "Colors Collide or Combine," learners are intrigued by the apparent "line" that forms where colors from M&M coatings meet but do not mix.

A Matter of Splatter
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In this math-based activity, learners will experiment to find how height and angle affect spatter and then use this knowledge to solve a crime.
What Does Life Need to Live?
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In this astrobiology activity (on page 11 of the PDF), learners consider what organisms need in order to live (water, nutrients, and energy).

Mystery Writing: Write and develop a secret message
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Learners write an invisible message using lemon juice on a piece of paper. They then develop the message by soaking the paper in a dilute iodine solution.

Self-Portrait Silhouettes: Activity 1
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In this activity, learners make a photographic image--without a camera!

Shapes and Angles
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In this activity (page 7 of PDF), learners will identify the general two-dimensional geometric shape of the uppermost cross section of an impact crater.