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In this activity, "write" a secret message in genetic code as beads on a string.

In this activity (on page 2 of PDF), learners make their own totem poles out of recycled materials.

In this activity, learners use simple items to construct a device for indicating air pressure changes.

Learners make a simple battery out of "sandwiches" of aluminum foil, pennies, and a salt water-soaked paper towel.

This activity encourages learners to focus on the natural environment of the Eastern Woodlands before the arrival of European settlers.

This activity explores the basic workings of a siphon, which is the core technology that makes toilets work.

In this activity, learners explore the concept of friction and how ball bearings reduce friction.

Learners design different shaped bandages for different purposes. First, they draw their designs on paper.

In this activity about the solar system, learners use various light sources to examine ice with different components to understand how NASA studies planets and moons from space.

Have you ever heard of a camera without a lens? In this activity, learners create a pinhole camera out of simple materials. They'll see the world in a whole new way: upside down and backwards!

In this activity, learners build a simple mechanism that regulates the "escape" of energy released by a falling weight by portioning it into discrete amounts.

In this activity, a group of learners work collaboratively to design and construct a paper model showing the evolution of an environment through multiple stages, from prehistory through the modern cit

In this activity, learners make a device called a phenakistoscope, which displays a continuously looping animation consisting of images drawn onto a spinning disc.

In this activity, learners explore the gait of horses by constructing flipbooks with British photographer Eadweard Muybridge's famous photographs.

In this activity, learners make an astrolabe, a device used for measuring altitude, including the height of objects in the sky.

In this activity, learners use simple items to construct a device for indicating air pressure changes.

This activity (on page 2 of the PDF under SciGirls Activity: Forecasting) is a full inquiry investigation into meteorology and forecasting.

In this activity (on pages 20-23 of PDF), learners build a model of a power plant using simple materials.

In this activity, learners build water-propelled engines from soft drink cans.

In this meteorology activity, learners build weather vanes using straws, paperclips, and cardstock.