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In this activity on page 7 of the PDF (Water in Our World), learners make their own water treatment systems for cleaning water.

In this activity, learners build a water squirter using a PVC pipe, dowel, and foam. This activity is great for the summer time and introduces learners to forces and water pressure.

In this activity on page 10 of the PDF, learners detect the amount of energy that can flow through a sodium chloride electrolyte solution with a light sensor.

In this activity about saturation (page 1 of PDF under SciGirls Activity: Sand Dunes), learners will build a series of sand castle towers using a 16 oz cup.

In this activity, learners construct a coastal landmass from sand and add features such as tidal creeks and barrier islands.

Learners classify a variety of objects by their characteristics. They then design an experiment to determine which objects float or sink in water and add this characteristic to their classification.

In this activity, learners construct a device that allows them to look over ledges or around corners.

In this activity, learners design a device to solve a problem: how to get a ball out of a drain pipe.

In this design challenge, learners design a storm drain cover that catches litter to protect waterways to learn about how local actions can have system-level effects.

In this simple chemistry activity (page 1 of PDF under SciGirls Activity: Colorblind Dogs) about acids and bases, learners will mix a baking soda and water solution and use it to paint a message on a

In this playful activity, learners explore the structure of the cell—the basic unit of every living organism—by creating a model of cell structures using soap bubbles, and by examining a slice of onio

In this archaeology activity, learners consider ways in which excavating an underwater site is different from excavating a terrestrial site.

In this math lesson, learners compare products to determine the best product.

In this math lesson, learners participate in several activities where they apply measurement skills.

In this four-part activity, learners explore how the body works and the chemistry that happens inside living things.