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In this activity about encryption, learners cut out a secret decoder badge from a handout and use it to encode messages to each other.

Learners make a simple battery out of "sandwiches" of aluminum foil, pennies, and a salt water-soaked paper towel.

In this activity (on page 2 of PDF), learners make their own totem poles out of recycled materials.

In this activity, learners explore how infrared technology is used by engineers to create equipment and systems for a variety of industries.

In this experiment, learners design and build a model room in a shoebox and furnish it with tiny furniture.

In this robotics activity, learners find ways to express emotions and feelings using only body movements, not facial expressions.

This activity explores the basic workings of a siphon, which is the core technology that makes toilets work.

In this activity, learners grow germs collected from their hands and other objects. They cultivate the germs on a growth medium (such as slices of grapefruit or processed cheese) for a week.