A thoughtful birthday-party gift, party-bag surprise, or take-home mystery for curious kids who love clues, secret codes, and the irresistible feeling of needing to know what really happened.
THE BIRTHDAY CAKE HAS VANISHED!!!
The clues are scattered. And the case will not solve itself.
Inside The Hidden Mystery Activity Book, children step into a complete detective investigation where every maze, code, fingerprint, suspect card, and hidden clue leads them closer to the truth. Nothing is random. Each page opens a new question, points to another piece of evidence, and pulls young detectives deeper into the missing birthday cake case.
With 50+ mystery puzzles for ages 6–9, children crack secret messages, follow suspects, check alibis, compare fingerprints, and work through logic challenges that quietly build observation, sequencing, pattern recognition, deduction, and problem-solving skills. Designed like real detective files, the book uses coded notes, evidence boards, classified documents, timelines, and case notebook pages to make the investigation feel active, cinematic, and alive.
But the final answer is not just about who took the cake. As the last clues come together, the mystery reveals something warmer: friendship, loneliness, and the small misunderstandings that can hide in plain sight.
From the Publisher





ASIN : B0H33Q862H
Publisher : Nors Publishing Co
Publication date : May 22, 2026
Language : English
Print length : 49 pages
ISBN-13 : 979-8995476627
Item Weight : 6.4 ounces
Reading age : 7 – 10 years, from customers
Dimensions : 8.5 x 0.12 x 11 inches
Part of series : Spycraft Kids
Best Sellers Rank: #259,822 in Books (See Top 100 in Books) #707 in Children’s Craft & Hobby Books (Books) #2,566 in Children’s Game Books (Books) #2,631 in Children’s Mystery, Detective, & Spy
Customer Reviews: 4.8 4.8 out of 5 stars (81) var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
$16.99