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Even fast computers are limited to how quickly they can solve problems. One way to speed things up is to use several computers at once.

In this technology activity, learners explore digital imaging and pixels. Learners "transmit" an image to a partner by creating an image on grid paper.

In this computer science activity about finite-state automaton (on page 45 of the PDF), learners use a map and choose various pathways to find Treasure Island.

Learners design different shaped bandages for different purposes. First, they draw their designs on paper.

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

In this activity (on page 2), one person "programs" the other like a robot to move through a space, trying to get them to avoid obstacles and reach a goal.

Learners explore the Bernoulli effect by building an airfoil (airplane wing) and making it fly.

Learners make their own simple slide rules out of paper and learn how they work.

In this activity (on page 2 of PDF), learners create a low-tech refrigerator that requires no electricity to keep food from spoiling.

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.