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Cardboard Box Camera Obscura
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In this activity, learners construct a device that projects images onto a surface, so they can trace landscapes and other sights.
Leaves: Extracting Pigments
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In this fun, hands-on autumn activity, learners experiment to discover whether the colored substances in leaves can be separated from the leaves.

Kites
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This activity (on page 2 of the PDF under SciGirls Activity: Kites) is a full inquiry investigation into how a kite’s shape affects its performance.

Bike Wheel Zoetrope
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In this activity (posted on April 18, 2011), learners follow the steps to construct a zoetrope, a device that produces an illusion of action from a rapid succession of static pictures, using a 16" bik

Give or Take?
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In this outdoor activity, learners work in pairs using their senses—especially touch—to learn more about individual trees.

Mini Zoetrope
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In this activity (posted on March 27, 2011), learners follow the steps to construct a mini zoetrope, a device that produces an illusion of action from a rapid succession of static pictures.

Plankton Races
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In this two-part activity, learners investigate buoyancy, density and surface area as well as biodiversity and the relationship between the structure and function of organisms.

Our Sense of Sight: Color Vision
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In this activity, learners investigate color vision as well as plan and conduct their own experiments.

Papermaking at Home
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Learners will follow a specific process to make their own paper using scrap paper, newspaper, or junk mail.

Special Effects Using Household Chemicals
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In this activity on page 4 of the PDF (Behind the Scenes with Chemistry), learners make some special effects, including snow and breaking glass, with supplies found in the home.

Paper Chromatography with Leaves
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In this activity on page 5 of the PDF (Plants—The Green Machines), learners use chromatography to separate and identify pigments within various leaves.

Engineering For Earthquakes
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In this design challenge, learners will engineer a structure and see if it can survive an earthquake they create.

Hydraulic Car
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In this activity, learners build cars using syringes and water-powered hydraulics. Learners construct the car frame out of cardboard and set up a hydraulic system to raise and lower the car.

Marble Drop Game
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Build your own version of a favorite carnival game, in which a marble races down a maze consisting of rows of nails.

Gymnast
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In this physics activity, learners build a toy with a figure that spins around like a gymnast on the high bar.

Mapping the Spread of HIV/AIDS: Trailing the Pandemic
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In this activity, learners act as epidemiologists by mapping the prevalence of HIV/AIDS worldwide.

Build a Tree
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This activity (on pages 13-18) has learners build a model tree and then figure out how to make their tree stand up by itself.

Electric Cup Guitar
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Make a one-string "guitar" by stringing a cup with some fishing line. You amplify the plucking of the string by placing a piezo contact microphone and mini battery powered amplifier inside the cup.

Let's Clone a Mouse, Mouse, Mouse...
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Somatic Cell Nuclear Transfer (SCNT) is a cloning method that involves transferring a nucleus from a somatic cell of the individual to be cloned to an enucleated egg.

Zig Zag Bopper
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In this activity, learners build a machine made of craft sticks to multiply the levering motion of their hands and create a device that bends and extends.