Code by Note, Book 2 - Find the Patterns by Reading the Notes
【英文版】音符密碼 第二冊：透過讀譜模式

Sharon Kaplan has provided another book of codes to decipher. A bit more challenging than Book 1 (but still within easy reading capabilities), the resulting geometric patterns in Book 2 are fancier and more intricate. A bonus feature of Book 2 is the inclusion of some blank grids for creative opportunities.

如果你的孩子程度好些或者年紀較大，不喜歡太可愛的東西，可以參考有類似玩「魔術方塊」的密碼幾何圖形進階版(Code By Note)