Nowadays, a lot of people are too dependent on calculators. Maybe because when they were young, they find math boring. We just need to teach our kids interesting and fun way in dealing with math. Math can be fun especially when you look at math in a completely different way.
Combine math with reading _ There are quite a few nice children's books out there about math and who does not like a deal. Imagine it's a 2 for 1 deal you are getting, with the opportunity for your kid to enjoy reading and math at the same time. The Sir Cumference series comes to mind with its attractive illustrations and adventures. Less than Zero is another. It gives a good introduction to the concept of negative numbers. Also One Hundred Hungry Ants appeals to kids too. Well who doesn't love bugs? Check out online stores where you can read reviews but remember to ensure that the reading level is not more advanced that necessary to get the math concepts across. If that is the case that will just take the fun out of it and make your children frustrated.