Maybe one way is to have a small group (Bible study group) that looks at all the different scriptures related to children in the Bible. Specifically the ones where Jesus talks about becoming like a child, or taking care of little ones, or letting the children come to him. Seeing children through Jesus's eyes is a great way to see their value. A great introduction to this is a video on this site called "The Great Omission." You can find it at: http://www.forchildren.com/discover/child/the-great-omission