Onyx NineAn Interactive Mystery for Kids
A locked cryptex, a six-chapter mystery, and one real treasure waiting for the kid who can crack the code.
WHAT IS THE ONYX NINE
The Onyx Nine series begins with Silas Finch, an eleven-year-old who stumbles onto a secret his grandmother spent her life protecting. Across six chapters, Silas pieces together a hidden code — and your child finds the same clues he does, decoding them along the way. The cryptex only opens when every letter is in place.
Welcome to the Onyx Nine.
The treasure is real. The lock is real.
The only way in is through the story.
HOW IT WORKS
Open the box.
A locked black cryptex, a note from a boy named Silas, and a QR code that opens the door.
Read the story. Hunt for clues.
Six chapters. Hidden inside each one is a secret clue. Find them all and the code reveals itself.
Crack the cryptex.
Enter the code. Open the lock. Discover what's been hidden inside.
WHO IT'S FOR
Built for curious kids ages 8–12. The ones who learn by doing, building, and figuring things out.
A gift they have to earn.
And that's exactly why they'll never forget it.
EARLY READERS
“He didn’t put it down. He just read straight for over 100 minutes — I’ve never seen him do that before.”
— PARENT
“I really liked the story and solving the clues on my own. They were a little hard but I figured them out. I want to do another one!”
— READER, AGE 10
FOR PARENTS
This is the activity you've been looking for.
No batteries · No parent guide · No subscription
QUESTIONS
What ages is this for?
+Onyx Nine is designed for kids ages 8–12. Confident readers on the younger end will love it. Older kids who love puzzles and mysteries will be challenged by it.
Is this a subscription?
+No. One purchase. One adventure. No recurring charges. No cancellation needed.
What comes in the box?
+A locked black cryptex, a note from a mysterious boy named Silas, and a QR code that starts the adventure. That's all they need.
How long does it take to complete?
+Most kids finish in one to two weeks depending on how fast they read and how quickly they crack the clues. There's no timer — they go at their own pace.
Do they need help from a parent?
+Nope. That's the point. They scan the code, start reading, and figure it out on their own. If they get stuck, there's a hint system built in — but most kids don't need it.
Is it digital or physical?
+Both. Scan the QR code and the story opens on any computer, tablet, or phone. The cryptex and mystery kit are physical and shipped to your door.
What if they don't love it?
+Then you don't pay for it. Send it back within 30 days of delivery — even if the cryptex has been opened — and we'll refund every cent. We built Onyx Nine for the kid who can't put it down. If that's not yours, the risk is on us.
The mystery is waiting
Are they ready?