Quick answer
The CrunchLabs Cipher Machine is a build-and-learn kit that demonstrates encryption by letting you assemble a mechanical device to encode and decode messages.
Why build a cipher machine?
Encryption is a core concept in modern security, and this hands-on kit makes it tangible. By building the machine yourself, you see exactly how each gear and lever transforms plain text into ciphertext. It's an engaging way for kids and adults to grasp substitution ciphers without staring at a screen.
What to expect from the kit
The Cipher Machine comes with 16 parts. Assembly takes about 30–60 minutes and requires no special tools. The mechanism uses a rotating disk and sliding components to map letters. Once built, you can set a key and start encrypting or decrypting messages. Note that the kit does not include batteries or electronics—it's purely mechanical, which is both a strength (no batteries needed) and a limitation (no digital features like auto-correct).
How to build and use your Cipher Machine
- Step 1: Sort the parts: Lay out all 16 parts from the kit. Identify the main body, rotating disk, slider, and small connectors. Refer to the included diagram to confirm you have everything. Common mistake: missing a small piece. Use a tray to avoid losing parts.
- Step 2: Assemble the base and disk: Attach the rotating disk to the base using the provided axle. Ensure the disk spins freely. Then insert the slider into the track so it can move left and right. Check that the disk isn't too tight—it should rotate with light finger pressure.
- Step 3: Set the encryption key: Align the disk to a chosen starting position (e.g., A=1). This becomes your key. Write down the key so both sender and receiver can use the same setting. Forgetting the key means you can't decrypt later. Store it safely.
- Step 4: Encrypt a message: Slide the indicator to each letter of your plaintext. Read the ciphertext letter shown on the disk. Write down the encrypted message. Double-check each letter—one misalignment changes the whole message.
- Step 5: Decrypt and play: To decrypt, set the same key and reverse the process: match the ciphertext letter on the disk to the plaintext letter on the slider. Use the machine to send secret notes or play code-breaking games with friends. Test with a short word first to confirm your key works before sending longer messages.
Product facts
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Cipher Machine - Encryption: The Cipher Machine - Encryption is a build-and-learn kit with 16 total parts, focused on encryption and cipher concepts. The manageable part count makes it a good first engineering project for ages 8 and up, while the mechanical design shows encryption principles without requiring a computer.
Cipher Machine - Encryption