Transforming Children into Spiritual Champions
I'd recommend buying Transforming Children into Spiritual Champions by George Barna on DVD or as a book:
The DVD also includes Developing a Biblical Worldview. Both seminars on the DVD are very good and will help you think through your children's spiritual development. Order from CBD or from Barna for $22-26. The book is about $13-$16.
Outlines for the DVD are also available.
Here are some discussion questions to go along with the book version. They are written by Mitch Majeski.
Week 1 -
Introduction, Chapter 1 and Chapter 2
Week 2 -
Chapter 3 and Chapter 4
Week 3 - Chapter 5 and Chapter 6
Weeks 4&5 - Chapter 7 and Chapter 8