This book is great whether you are new to children's ministry or an old veteran. It is inspiring and causes you to think about how you are doing things. I will be re-reading this one and then passing it along to a friend!
Not the best theologically, but I purchased a copy for everyone involved in our Sunday School ministry and set up a date for them to discuss their reactions. It really helped them think out of the box and create an ongoing process of continually looking to make our program better.