My main thought on working with kids is working with kids is hard! I can understand why kids would be shy when it comes to taking pictures because i'm a total stranger to them! My mom always told me to not talk to strangers and all of a sudden now you have to pose in front of one? Yeah....that's really confusing. What makes it harder is sometimes the parents get upset at the kids and that makes the kids even more upset and at that point, no one wins. My way around this whole situation is, get the kids more involved. I always try to talk to them and play with them. They will trust you and will be more willing to work with you when it comes to posing and smiling. Keeping the kids happy keeps the parents happy and the shoot will go a lot smoother!