Binary Code Christmas Ornaments

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Binary code Christmas ornaments are a simple STEM activity that feels festive and has some real learning behind them. Plus, it’s a unique and techie way to share a Christmas greeting. These make fun Christmas present for a grandparent, and your child can explain to them how binary code works!

I used a binary code bracelet activity when I was coaching a FIRST Lego team and was teaching 9 to 11-year-olds logic and coding.

After spending over 16 years as a coder and IT Director, coding comes naturally to me, but when we teach our children about binary code and how computers work, we really have to break it down. This Christmas coding activity provides students with a concrete representation of concepts that can seem so very abstract to them.

Once you start filling out the binary code for the message, because the binary code only uses two symbols 0 and 1, it helps ESL students focus on the logic and pattern-building rather than having to learn vocabulary.

I have seen children who struggle with language shine during this activity. We also had some children on our FIRST Lego team who adamantly said, “My brain isn’t wired for computers or coding. I could never….” With this activity, they can!

I have seen how powerful these unplugged coding activities are in helping kids understand the logic behind coding before they even touch a computer keyboard or mouse.

Why Teach Binary Code with Beads?

Every letter your computer reads, every emoji, keypress, and keystroke, is stored as an 8-bit number in the ASCII system. Instead of 0s and 1s, we’ll assign colors to represent each bit. Your kids can “write” a Christmas message using red and green beads or red, green, and white beads.

In the process of creating this beaded and coded message, your kids will learn:

Instructions for Making Binary Code Christmas Ornaments

Before starting this activity, request the accompanying printable pack by using the form at the bottom of this page.

Materials Needed:

• red, green, and white pony beads
• chenille sticks
• ASCII binary code printout
• Pencil and printout for planning their message and ornament

How to Make a Binary Code Christmas Ornament

2. Assign Binary Colors. Next, you will need to assign colors to represent the bits 1 and 0. You have some options here. If you are using white, green, and red, then you can assign Red= 1, Green = 0, and white are the spaces between words.

3. Convert Each Letter to Binary. Use the ASCII chart and convert each letter of the message into its 8-bit binary code, for example

• JOY would be:
  • J   01001010
  • O   01001111
  • Y   01011001

4. Build Your Binary Ornament

• For each bit in the binary sequence:
  • If the bit is 1, add the colored bead assigned to 1.
  • If the bit is 0, add the colored bead assigned to 0.
  • Optionally, add a white bead between words or letters.

What This Teaches

This binary code Christmas ornament reinforces the same problem-solving skills I taught on my FIRST Lego teams:

• Breaking down a problem: Students learn to translate one letter at a time, one bit at a time.
• Debugging: If a bead is out of place, the whole message changes, just like in code.
• Sequencing: Order matters. Students quickly see how changing a single 0 or 1 changes meaning.
• Communication without language: Binary is universal. This makes it perfect for multilingual learners.
• Perseverance: Complexity grows with each letter, and kids learn to stick with the process, even when they think, “I can’t code.” or “I don’t have the brain for computer programming.” (I’ve heard that before!)

It’s coding without screens, and the students don’t even realize just how much they are learning!

If you want more coding resources, check out our Hour of Code printable resource list.

Here are some recommended coding resources.

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