Bedtime Math
This is a wonderful Math site to take a look at:  .   
It works similar to reading a book with your child every night, but instead, there is a short story/informational article and a math problem to figure out.  There are variations from easy to hard with the math problem.  Each night there is a different problem and they pretty much deal with things in the everyday life of children. 
Laura Overdeck is a mother and creator of Bedtime Math.  Besides the website, she is writing a book called Bedtime Math. which will be published in June, 2013.
You can sign up for emails from the Bedtime Math website and access older math stories/problems too. 
Please take a look at it and try it with your child.  This is a great way to learn how to problem solve in Math.