One way to teach logic with children is to use Sudoku games. I have started with grade three students. If you are not familiar with this popular logic game, click here.
I would start with something simple, such as a 4 by 4 grid to teach the basic idea. Also I would be sure to start with easy problems or ones that have lots of clues. You can make your own puzzles with a 4 by 4 grid template and a puzzle generator of which there are numerous versions available online. Here is a link to my personal favourite entitled Sudoku for Kids.
