Although I do it in moderation, I believe kids should be praised for doing good. (I've already voiced my feelings on praising every little thing they do - after awhile it jsut doesn't mean anything.) Kids needs to know you appreciate the good things they do. As kids master a good behavior, you can choose to communicate your appreciation with even just a simple thumbs up or a smile and a wink. Just don't take their good behavior for granted - especially when it's a new one they are learning.