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Natural Buffers
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Learners use a universal indicator to test the amount of sodium hydroxide needed to change the pH of plain water compared with the amount needed to change the pH of gelatin.

Wetlands
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Learners create a model of a wetland to observe how it absorbs and filters water from the environment.

As Straight as a Pole
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In this engineering activity (page 3 of PDF), young learners investigate how a pole can be made stable by “planting” its base in the ground or adding supports to the base.

Inside DNA
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In this activity (on pages 34-39), learners make a fairly detailed model of DNA using licorice and gumdrops.

Pollinator Bath
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In this activity, learners will build a design and build a place for pollinators to drink from.

Dinosaur Homes
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In this activity about dinosaurs and survival, learners use scrap materials to create a miniature dinosaur habitat that includes a food source, water source, and shelter.

Programming Languages: Harold the Robot
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In this activity related to computer programming, learners give directions to a "robot" (either an adult or another learner) and find out which instructions the robot is able to follow, and how their
Yeast Balloons
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Visitors observe a bottle with a balloon attached around the mouth. The bottle contains a solution of yeast, sugar, and water.

Common Scents
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Learners use a mortar and pestle to extract clove oil from cloves using denatured alcohol. They put this oil on paper, which they can take home.

Buzzing Bee
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In this activity, learners explore sound by constructing an instrument toy that buzzes when you swing it.

Dinosaur Sock Puppet
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In this activity about dinosaurs, learners first participate in a group discussion about where and when dinosaurs lived, how big they were, and who studies them and how.

Mapping Sea Level Rise
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In this activity related to climate change, learners create and explore topographical maps as a means of studying sea level rise.

Wash Away Germs
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Many germs spread by our hands, and often times, people don't wash their hands well enough to get rid of germs.

Feed the Birds
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Learners construct a bird feeder from re-used materials. After hanging their feeder, they keep a journal about what birds visit the feeder.

Cell Division
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This activity was designed for blind learners, but all types of learners can use it to investigate how, in a one-celled organism such as a bacterium, the division of cells increases the number of cell
River Catcher
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In this activity (located at the top of the page), learners make an easy river strainer and see what they can catch.

Learning the Land
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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.

Dinosaur Dig
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This is an activity about dinosaurs, fossils, and the work of paleontologists. Learners use hand tools (paint brushes, scoops, and sifters) to unearth fossil specimens in tubs of birdseed.

Observing Earthworm Locomotion
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In this activity, learners collect worms and then observe how they move.

Make a Terrarium
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In this activity, learners make a miniature greenhouse or "terrarium" to explore the greenhouse effect.