Shapedoku can be solved by individuals and, as demonstrated here, can form the basis of a review for geometry students as they create their own. In this article, we trace the evolution of Shapedoku puzzles from their Sudoku ancestry, describe how one high school teacher introduces them into her geometry classroom, and highlight some high school students' work as they reason through their own creations. Finally, we provide activity sheets of puzzles created by high school students for teachers to use in their own classrooms.