I think I speak for most writers when I say that we hope the books we write has some sort of impact on the people who read them, in my case with kids. I can honestly say even though my book is not on the market I have already seen the effect. Not from the story but from the act of writing it. In the picture you see below is my daughter reading a book to her pre-school class that she wrote and illustrated.
The other day my daughter said she wanted to write a book like daddy, so she told us the story, my wife wrote it down and then my daughter drew the pictures. I have to tell you the amount of pride I feel is worth more then any advance I received or will receive from a publisher. It just reminds me the effect we have on our children. The things we say, and the the things we do do not go unnoticed. That goes for the positive and the negative. We as parents are the role models for our children. If you want your children to eat junk food then you should eat junk food. If you want your children to sit in front of the TV then you should sit in front of the TV. But if you want your children to read books instead of watching tv, then you need to be seen reading a book. You hear these things all the time, but when you see it in action it is so much more powerful.