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This is an activity where learners will discover what types and how many insects live in their own backyard.

Learners work in teams to design and build solar water heating devices that mimic those used in residences to capture energy in the form of solar radiation and convert it to thermal energy.

In this outdoor activity, learners plan a simple foot path and create an environmental impact study of the natural area where the path would be.

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

Learners will explore the concept of angular distance, and investigate why the moon appears to be the same size as the sun during a solar eclipse, despite the sun being much larger.

In this activity, learners capture and observe planaria, which are worms that eat tiny pond critters.

In this activity, learners model a population of deer and see how the number of deer changes over time.

In this activity, learners use Styrofoam to collect organisms from a pond, estuary or marine environment and then examine what they have caught with a microscope.

This guide outlines how to plant a garden even if you don't have a yard!

In this activity, learners build an instrument for catching and observing flies. Learners act as entomologists, attract flies into a jar using a slice of apple, and then observe the flies' behavior.

In this activity, learners work in teams to study the observation skills essential to scientific research.

In this activity, learners use a simple trick of perspective to dress friends in tiny cutout clothing. Learners make tiny pants out of card stock and tape them to the end of a stick.

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

In this activity, young learners will make their own flower seed nursery in an egg carton.

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 observe fly behavior and then build a flytrap.

In this activity, learners will take a step back and learn the history of the land they live on, and the people who used to live on it.

In this activity, learners create a sealed, mini ecosystem that supplies freshwater shrimp with food, oxygen, and waste processing for at least three months.

In this activity, learners explore the concept of valve operation and how engineers have adapted valves for use in mechanical heart valve design.

In this international citizen science activity, learners measure their night sky brightness and submit their observations into an online database.