Spy Birthday Party Ideas — Spy Mission and Clues

We had such a fun time with Lu’s Spy Birthday Party. I’m secretly sad that I won’t be able to use that theme again. I think I had as much fun as the kids! Honestly, there is just too much to share in one post. Today I’m sharing our Top Secret Spy Mission (and some free printable clue keys).

Such fun spy birthday party ideas! Send the kids to spy training and then on a top secret mission to find the hidden time bomb. Great ideas for clues, too! {OneCreativeMommy.com}

We started the party by giving the kids spy training. Once they were trained, we created this Top Secret Mission for the agents to test out their new skills. Special thanks to Stitch/Craft Creations. Many of my spy clue ideas came from there.

Top Secret Spy Mission Clues

RELATED: Spy Party Invitations, Spy Training Course, Cherry Bomb/Firecracker Cake Pops

I’m sure no one will want to exactly duplicate my spy mission (since everyone’s home and resources are different), but I’ll walk you through all the clues to give you some ideas.

At the beginning of the mission, the agents were told that Doctor Bad had hidden a time bomb somewhere at the camp. Their mission was to follow the clues and find and disarm the bomb. The agents were given the first clue and a bag of decoders (a graph cipher, a peek-a-boo cipher, a mason cipher, and an empty toilet paper tube). They had to decide which ciphers they needed for each clue. (It was pretty easy, since all they had to do was match the colors.)

Mirror Spy Birthday Party Mission Clue {OneCreativeMommy.com}

Clue #1: Mirror Clue

The text on this clue reads:

In order to become super spies, you must learn to use your eyes! “Reflect” on this message to find your first clue.

Then, on the bottom half is a poem that has been flipped so that it has to be viewed in a mirror in order to read it. It says:

You can eat hot dogs boiled or fried, but to make them taste best, better go outside!

That clue leads to an outdoor barbecue grill.

Stretched Word Spy Birthday Party Mission Clue {OneCreativeMommy.com}

Clue #2: Stretched Word Clue

This clue says the word FRIDGE with some extra squiggly lines before and after the word. The whole thing is stretched so that it’s difficult to read unless you lay the clue on a flat surface and then crouch down so that the clue is at eye level.

*This clue is included in the printables. I figure everyone has a fridge, so this clue should work for anyone.

Peek-a-Boo Cipher Spy Birthday Party Mission Clue {OneCreativeMommy.com}

Clue #3: Peek-A-Boo Cipher

This clue is found in the refrigerator. Here’s what it says:

Head to the room that holds nothing but books. Find “Cam Jansen and the Mystery of the Dinosaur Bones.” Solve this math problem to find the page you need.

(10 x 3) -1 =

The kids solve the math problem, go to the den to find the books, and locate the specific book. Then, they slide the cut-out page into the book (on page 29). The clue can then be read through the cut-out windows. (Sorry I can’t give you a template for this one. This was definitely the trickiest clue to create!) The message reads:

The missing clue is found at the front entrance.

Graph Code Spy Birthday Party Mission Clue {OneCreativeMommy.com}

Clue #4: Graphing Cipher

The next clue is found outside and near the front door. Using the graphing cipher, the message reads:

Mary, Mary, quite contrary

The clue leads to the garden. *The graphing cipher key is included in the printables.

Mason Cipher Spy Birthday Party Mission Clue {OneCreativeMommy.com}
Clue #5: Mason Cipher

The clue in the garden, when translated, says, “Tall Clock.” The next clue is found on the Grandfather clock.

*The mason cipher key is included in the printables.

Scytale Cipher Spy Birthday Party Mission Clue {OneCreativeMommy.com}

Clue #6: Scytale Cipher

The kids use the toilet paper tube to decipher the last clue. To make this clue, cut a long strip of paper and wrap it around the toilet paper tube. Write your message, and then unroll the paper strip. Without the toilet paper tube, it is unreadable.

The final clue leads the agents to the backyard, where they find this Time Bomb Piñata. Stay tuned for my next post to find out how I made it.

The perfect way to end a Spy Birthday Party! Kids have to disarm the piñata by pulling on the strings. {OneCreativeMommy.com}

Click the download link below to open the pdf clue printable files. (A new page will open. You can print from there or save the file to your computer for later.)

Click to download

I hope you have a lot of fun creating your own Spy Birthday party!

You might like some of these ideas, too. Images below are linked to posts.

Harry Potter Party Invitations Delivered by Owl Post {OneCreativeMommy.com} #harrypotter #birthdayparty #halloweenparty

Quick and Easy Snowgies Craft for Kids inspired by Frozen Fever! {Soon your house will be covered with these adorable baby snowmen!} Tutorial on OneCreativeMommy.com

Cool printable spy party invitations. Just fill in the info, and you're ready to go! {OneCreativeMommy.com} Perfect for spy and secret agent birthday parties. Personalization available.

See you next time!



  1. Oh my gosh! These are great–I love all the different approaches to finding clues. Sounds like an amazing party!

  2. Heidi, what a fun idea for a birthday party….spies! Thanks so much for all these great ideas!

    • Thanks, Marilyn. The theme was my daughter’s idea. (I’m glad she switched from Shopkins–that’s a toy. I had no idea what to do with that! This theme was a lot of fun.

  3. Wow! What a great party! My kids would love this for a party or just an activity for a boring summer day. I’ll have to get my act together and use some of your ideas. Thanks!

  4. Oh I love the Time Bomb Pinata! My kids love codes- I’m going to have to try this next week just for fun! Thanks for the idea! Pinning it

    • Do it, Camille! The kids loved it. Just be prepared because they will all want to be the one to do the decoding. We had to take turns. The tutorial for the pinata is on it’s way.

  5. Oh goodness I bet they LOVED solving that- one big puzzle! How old is the birthday gal? Gotta keep this in mind for when my kids get a bit older.

    • The party was for my 8-year-old daughter, but she had some ten-year-olds there, and they enjoyed it as well. For this part of the party, the kids need to know how to read. The rest of the party, though, could be for almost any age.

  6. I’m seriously going to throw a spy party for my kids just because. These are some awesome ideas! I love all the clue and cipher ideas. And the time bomb pinata – ingenious! Maybe I’ll plan one for the end of summer before school starts again.

  7. I LOVE this! THANK YOU for sharing all your very creative ideas. I was totally stumped when Daughter announced that she wanted a Detective-themed party. These ideas are perfect!

    • I’m so glad I could help, Beth. I hope your party turns out great! Thanks so much for taking the time to say thank you!

      • Thank you Heidi!
        My Daughter wants the kids to be divided into 2 groups, and 2 separate missions. (she likes giving me a challenge) I finally finished the clues, and am getting very excited for her party!!! THANK YOU so much for all your tips, and for sharing this with me.

  8. How did you create the mirror message? Is there a font on Microsoft Word, or did you hand print the message?

    • I should have thought to explain that in the post, Beth. Sorry! It’s really simple if you have a photo editing program, but also doable if you don’t.

      In Photoshop or similar program, create a text box with your message. Next, flip the image. Done. If you are using a program that won’t allow you to flip your image, just print out the text you want, turn the paper over and tape it to a window when the light is shining in. Tape a blank paper on top and trace the backwards message. Good luck!

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