Want to give your fourth grader some inconspicuous practice with numbers? He'll never suspect that he's boosting his math and critical thinking skills with this colorful Sudoku puzzle! He'll delight in the challenge of finding the correct number placement and making sure to never repeat a number in the same row, column, or 3 x 3 box.

If he enjoys this activity and is looking for more, download the other worksheets in the "Sew-doku" series!