How do mothers respond to real attention from their children? To find out, we developed an innovative Hallmark greeting card especially for Mother’s Day. With a tiny flat camera embedded within a Mother’s Day card, the Hidden Camera Card captures the reactions of mothers to the touching words of their children. A special team of technicians and cameramen worked with a group of kids to surprise their mothers. Unaware that the card was recording them, the mothers’ tearful reactions showed the deep emotional impact that Hallmark greeting cards have on receivers. Watch a short behind the scenes video showing the extraordinary approach of this experiment.