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

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 are challenged to build a bird feeder using recycled materials from home and are encouraged to problem solve during the extensions.

In this activity, learners construct possible food webs for six different ecosystems as they learn about the roles of different kinds of living organisms.

In this yummy activity about soil (page 9 of PDF), learners will create layers of soil using food. They will learn about the composition and role of each layer.

In this activity on page 24, learners perform experiments to examine whether or not trash can float, blow around, or wash away.

In this food science activity, learners observe different plant-originated foods.

In this activity, learners explore the web of connections among living and non-living things.

In this activity, learners are challenged to design, build and test a birdhouse that will stay cool in the sun.

In this activity, learners explore the Great Plains.

In this activity (located on page 2), learners will construct tiny model geysers out of film canisters, warm water, and antacid seltzer tablets.

In this activity, learners build one or more edible coral polyps and place them together to form a colony.

In this activity, learners will turn an ordinary tray of sand into a desk-top garden for meditation.

In this activity, learners will observe birds in their backyard or local park. They will attempt to find common Ohio birds and will look for bird behaviors just like an ornithologist.

In this activity, learners examine ways that Native Americans of the Southwest express their relationship with nature through art.

This activity attempts to clear up the common misconception that deserts are always hot, totally dry, and uninhabitable.

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

In this activity, learners will discover what colors are in different markers, and may be surprised at the results.

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.