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In this activity, learners work in groups to build simple solar stills filled with salt water. After the stills are complete, learners observe what happens when they place the stills in the sun.

In this activity, learners create a biosphere in a baggie.

Test the buoyancy of an aluminum foil boat and an aluminum foil ball. Why does the same material in different shapes sink or float?

In this activity, learners build water-propelled engines from soft drink cans.

Learners are challenged to discover the relative densities of colored liquids to create a rainbow pattern in a test tube.

Learners design, build, and test models of "dragon boats" made from up to three milk cartons.

In this activity, learners of all ages can become food scientists by experimenting with flour and water to make basic pasta.

In this activity, learners separate a mixture of pebbles, salt crystals, and wood pieces. They add water and pour the mixture through a strainer.

In this chemistry challenge, learners identify an unknown white powder by comparing it with common household powders.

In this chemistry activity, learners prepare two petri dishes, one filled with water and one filled with milk.

Learners make their own paper using old newspaper. Learners can make their paper colorful by adding construction paper.

In this activity (on pages 13-16 of the PDF) learners investigate three mystery samples to see which one contains life. The three samples are sand, sand and yeast, and sand and antacid.

In this outdoor activity, learners explore UV rays from the Sun and ways to protect against these potentially harmful rays.

Learners are challenged to create solutions that conduct electricity and make a buzzer buzz (or an LED light up).