My grandchildren come home from school with little certificates saying they have made a good effort or been helpful in class, etc.

When I was little, the first time I went to Sunday School I was given a little stamp like a postage stamp with a picture of Jesus, and a booklet to stick it in, and told I would get another stamp next time I went. But next time they announced that they weren't doing the stamps any more. I was very disillusioned.