Daniel lives across the street from Sofie. What can he build to send messages to her?

Find someone across the room.
Try to send a message.
But don’t talk!

What if they’re not in the room?
Then what could you do?

What are some ways people use light to send messages?

Discuss Daniel’s problem.
Find some ways to use light as a code for messages.

Write them down.
(For example, flash once = yes; flash twice = no; flash three times = I don’t know.)

Design a device that sends a message by flashing lights.

Program your device to send messages.
Use the light codes you planned.

Explain:
What is your design idea?
How does your device help send messages across distances?

Explain:
What was the hardest part of solving the problem?
Did your design work? Did you change it?

Explain:
What message code did you create?

Now plan some ways to use sound as a code for messages.

Write them down.
(For example, clapping hands sound = happy; dog barking = would like to play.)

Design a device that makes sounds.
Then build it.

Program it to use the sounds to send coded messages.

Great job!