I hate what I like to call "pat me on the back parenting." I am well aware of the fine line between telling and bragging when it comes to your children's activities. But I think you cross the line when you brag about what your child does in terms of charity work. At that point it becomes not so much what your child does, but "look at me I'm such a great parent because my kid did this." It's OK to be proud of your kids and it's OK to tell grandparents or close friends but beyond that just goes too far.