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  • Pick a mystery

    Choose from 8 original stories for ages 4-10.

  • We mail the first letter free

    Your child gets a real envelope with clues, maps, collector's cards and more inside.

  • They start solving

    Every clue builds toward cracking the case. One new letter arrives each week for 6 weeks. No screens required.

  • Love it? Continue the adventure

    Grab the full 6-letter mystery and we'll pick up right where they left off.

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🧠 More than just a mystery

While they're solving the case, they're also learning about real-world topics like our solar system, ancient farming techniques, wildlife habitats, crime-solving methods and more. Every story weaves real knowledge into the adventure so your child is learning without it ever feeling like a lesson.