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This activity shows learners how computers use numbers to represent pictures. A grid is used to represent the pixels (short for picture elements) of a computer screen.

In this Cyberchase activity, learners make decoders to send and receive secret messages. Learners make the device out of two 8-ounce cups and two code strips.

In this activity, learners discover how artists start with a skeleton and turn it into a realistic drawing of a dinosaur.

Learners create an Incan counting device called a quipu (pronounced kee-poo).

In this activity, learners will explore how maps can provide information about a place and help us find our way from one location to another.