The Morse-Code Optical Signaling Flashlight Telegraph

30 mins Ages 6-11 Anywhere

An engaging, screen-free learning activity that builds real-world creativity and critical thinking for kids aged 6 to 11.

Materials Needed

  • • Handheld pocket LED flashlights (2 units)
  • • Printed International Morse Code reference chart (2 sheets)
  • • Notepad and pencil (2 sets)

Pro Tips

  • → Establish rhythm basics: a "dot" is a quick flash (1 beat), while a "dash" is a sustained light beam (3 beats).
  • → Start by signaling simple words like "S-O-S" (... --- ...) and "H-I" (.... ..).
  • → Sit on opposite sides of a darkened room, transmitting and decoding one character at a time.

Safety First

Do not shine flashlights directly into eyes at close range.

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Step-by-Step Instructions

1

Step 1

Review the printed International Morse Code chart together, practicing the timing of short dots and long dashes.

2

Step 2

Turn off room lights and sit on opposite sides of a long hallway with flashlights and notepads.

3

Step 3

Transmit a 3-letter secret word (e.g., "CAT") using pulses of light, leaving a 2-second pause between letters.

4

Step 4

Decode the partner's light flashes onto paper and flash three quick pulses to confirm reception.

What they are learning

Binary dot-dash signal transmission Visual rhythm decoding under time pressure Historical naval optical signaling (Aldis lamp)