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This activity is a sensory experience that recreates the sounds of a pond at night.

In this optics/mathematics activity, learners use two hinged mirrors to create a kaleidoscope that shows multiple images of an object.

In this activity about afterimages, learners explore what happens when receptor cells called cones in your eye's retina get tired.

In this activity (posted on March 14, 2011), learners follow the steps to construct a camera projector to explore lenses and refraction.

In this activity, learners make their own heat waves in an aquarium.

In this activity, learners experiment with their voices and noisemakers to understand the connections between vibrations and the sounds created by those vibrations.

This is an activity (located on page 4 of the PDF under What's Nano? Activity) about size and scale.

In this activity, learners imitate the way vocal cords work by building a model from a plastic cup, rubber band, and a straw.

What's a Pickle-Oh? Two pieces of pickle on a stick are connected to a Pico Cricket (micro controller). When you slide the pickles apart the note changes.

In this wintertime outdoor activity, learners role play wolves tracking their prey by following scented trails.

In this activity, learners make a photographic image—without a camera!

This activity investigates how bark beetles can threaten forests by having learners estimate the number of infected trees from a photo.

In this activity about light and reflection, learners discover that what you see is often affected by what you expect to see.

In this activity, learners use their sense of smell to explore the world on the nanoscale.

In this activity, learners play with a fuzzy-colored dot that has no distinct edges seems to disappear. As learners stare at the dot, its color appears to blend with the colors surrounding it.

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

In this activity, learners investigate parallax, a method used to measure distances to stars and planets in the solar system.

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.

In this activity, learners explore sound by constructing their very own instruments using PVC pipes, soda bottles, and a straw.

In this activity, learners construct an indoors obstacle course and discover how using an eye patch can help them complete the course in the dark.