Mission 149
Puzzle Door: A Code Lock Only You Can Crack
Badge: Code Master
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Build a lever code lock, then challenge someone to crack your code.
Four levers. One secret code. A door that opens for you alone, then a dare for the family to crack it.
- New skill Combining logic gates into a lock
- Level 2 · Rise of the Kingdom
- Difficulty Beginner
- Mode Survival
- Time 40–45 min
- Ages 13+
What you’ll build
Pick a secret lever code and build a lock that opens only when it's set just right. Combine what you know about logic gates so any wrong lever keeps the door shut. Test right and wrong codes, then challenge someone to crack it.
Finish line: Your lock opens only with your secret code, and someone has tried to crack it.
Bonus challenge: Add a fifth lever. How many patterns now? Hold a family crack-off: who breaks it fastest?
You’ll need
- Redstone
- Redstone torches
- 4 levers
- An iron door
- A family member to crack it
You choose
- Your secret code (keep it hidden!)
- 3 levers or 4
- Prize for anyone who cracks it
Stuck?
- If a wrong code opens the door, check each torch or lever is really touching the wire.
- Redstone dust needs a solid block under it.
- Test at least three wrong codes before you invite anyone to try.
For grown-ups
Get this mission
This mission is in Mission Pack 14. Each printable has the full steps, a Plan & Log page and a parent page.
Print one mission at a time. You never need to print everything.
Played on Minecraft Bedrock on iPad. Buttons can differ on other devices and versions.