I love adding logic games to the kids' homeschool. I like how they challenge them to think in different ways to solve problems. We have a whole lot of single and two player logic games because I am convinced it will help the kids to be able to look at problems and puzzle it out.
Most of the ones we have are from Thinkfun because I like how they start very simple and progressively get harder. My kids are four years apart and they can both use the same game just at different levels.