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Learners build a filter from old soda bottles and dirt. They create polluted water, and pour it through their filter to clean it.

In this design challenge, learners use their creativity and imagination to design and test a wildlife crossing for their favorite animal.

In this outdoor activity and bingo-like game, learners explore why and how seeds spread far from the plants that produce them.

Some aquatic organisms live in open water, while some live in soil at the bottom of a body of water.

In this activity, learners listen to a story and tell a story of their own as they learn about the importance of elders in Native American cultures.

In this activity, learners will explore reptile biology by taking temperature readings in various places and comparing them.

In this activity, learners experiment and observe how the color of materials that cover the Earth affects the amounts of sunlight our planet absorbs.

In this activity, learners work in small groups to match various marine animals with their different environments.

In this activity, learners start their own field journal to better understand the wildlife in their area.

The goal of this activity is to design, build and test a house or toy for an animal.

In this outdoor game, learners role play predator and prey to explore the importance of keen hearing and silent stalking skills in the animal world.

In this creativity-based activity, learners imagine what the Earth will look like in the near and distant future, then design their own future habitat and creatures that may live there.

This activity has three story puzzles learners can solve to learn about life in the Arctic.

This exercise is designed to teach young learners the different parts of a plant (root, stems, leaves, flowers, fruit, and seeds), the basic functions of each part, and to show that tiny microscopic o

In this Bob the Builder(TM)-themed activity, learners go on a nature walk outside and describe what they observe using their senses.

In this game of chance, learners will discover how organisms colonized the Galápagos Islands, experiencing how chance plays a role in the successful dispersal of species to new areas.

Learners complete a series of hands-on and investigative activities to explore cumulus clouds.

In this activity, learners help identify native and non-native plant species, learn about invasive species, and determine how native plants provide a healthier habitat.

In this activity, learners explore the possibilities of clay as a natural material.

In this Energy and Environment activity (page 9 of the PDF), learners calculate the mass of a piece of gum, compare it to the mass of the gum's packaging, and then create a bar graph of the results.