Sudoku, a worldwide craze, has a worthy addition in Picdoku, which features 60 reusable Sudoku puzzles with a twist — there’s not a number in sight. On one side of each puzzle are animal images, and on the other are geometric shapes. Each game of logic includes 30 double-sided boards, two complete sets of reusable tokens and a solutions book. They range in difficulty level from 1 to 5. Launch date: July 2006.