One great way to teach it is by using math worksheets. One could make worksheets that are fun for children to complete. Adding graphics such as fruit and candy and having the children add them up will open their minds to it and have them learning in a fun way. Also, the sense of accomplishment the child has after completing the math worksheet correctly will encourage him to continue learning the subject.
For those parents who are too busy with work, an online math course is one way to show your kids how to have fun with math. You can find lots of math worksheets on the site where you can formulate addition, subtraction, multiplication, and division worksheets. You can also find on the site ways or methods on how to teach your kids that math is fun and not boring. Have fun with math!!!