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In this online activity, learners crack the special code imprinted on envelopes to help the U.S. Postal Service deliver the mail.

Learners write a message in Braille using beans to form the patterns of dots. Learners glue beans in place, and then challenge another learner to read the message.

In this activity, learners discover that training a robot can be hard work! Learners investigate how robots complete a task by following a list of sequential instructions.

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