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Secret Writing Devices
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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.

Musical Ice: How to Make an Ice Theremin
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Build a musical ice theremin by programming a micro controller, like a Pico Cricket to respond to resistance generated by the ice melting, or the ice being touched.

Fruit Xylophone: Fruit Salad Instrument of the Future!
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This is a perfect summertime lunch activity! Pico Cricket is required (micro controller). First, get a bunch of cut up fruit, line them up, then plug a piece of fruit with a Pico Cricket sensor clip.

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

Build Your Own Robot Arm
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In this lesson, learners develop a robot arm using common materials. Learners explore design, construction, and teamwork, as well as materials selection and use.