シークレットデコーダーセット - 滑りやすい足ひれの事件

The decoder wheel is the real star here — my daughter figured out the cipher on her own and felt like an actual detective cracking the case. It's small enough to toss in a backpack, which saved us on a rainy vacation afternoon.

Kept my 8-year-old busy for the entire three-hour flight, which honestly never happens. The built-in decoder wheel makes her feel like an actual detective, and the flipper mystery kept her guessing till the last page.

The decoder wheel is the real star here — my 8-year-old spent a solid hour cracking codes on her own without asking for a screen once. It's slim enough to toss in a backpack, and the mystery actually made her slow down and read carefully.