Combination Vault

Ages 9-16+

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Engineer a combination vault in which to stash your secrets, accessible by a numeric code only you know (shhh). Then learn about other sneaky spy gadgets and encryption tools, and the science behind them — from cipher disks, to code charts, to World War II's Enigma machine.


  • Build the inner tube
  • Build the outer tube
  • Build the code rings
  • Assemble the vault


  • Lock Mechanisms
  • Combinations
  • Secret Codes

Using charter school funds?

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4 reviews

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    Stephanie, Dec 28, 2019

    My 9-year Old Says...

    "This is an awesome kit! It's challenging, but I wish the vault was bigger. I was disappointed that it's so hard to change the code if you want to later on."

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    Stephanie, Jun 23, 2019

    Confidence builder

    This was a creative and informative hands-on activity that my child managed to do on his own. The challenging aspects of building on adds to his confidence! My son felt so accomplished after the hard work he put into the project and the combination vault is still used in his room.

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    Monica, May 20, 2019

    Secret hiding place

    My son loved this one! He had so much fun creating it and then stumping the rest of the family! He loves that he has a secret code to keep from his siblings and now he has a place to hide things from his siblings as well!

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    Kerry, Mar 10, 2019

    Awesome concept

    The concept was awesome -- my daughter loves having a secret place only she can get to! It was fun to put together and my daughter loved that she could customize her password. It involved problem solving and patience, with clear instrutions for the entire project.

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