Spiffy Activity Books
Fun and Mindful Activity Workbooks for All Ages
new activity books coming soon
![Gigantic 25x25 Sudoku Volume 1 - Spiffy Activity Books - 120 puzzles designed for seasoned Sudoku solvers who find the traditional 9x9 puzzles too easy. [front book cover]](https://www.spiffyactivitybooks.com/wp-content/uploads/2026/05/gigantic-sudoku-vol1-frontcoverjpg-792x1024.jpg)
![Gigantic 25x25 Sudoku Volume 2 - Spiffy Activity Books - 100 puzzles designed for seasoned Sudoku solvers who find the traditional 9x9 puzzles too easy. [front book cover]](https://www.spiffyactivitybooks.com/wp-content/uploads/2026/05/gigantic-sudoku-vol-2-frontcover-792x1024.jpg)