Pinch the frog with two fingers. The frog princess and frog come from the story of early childhood education. When the frog asked the princess to carry him to bed, the princess pointed at the frog with two fingers. The frog prince is taken from the first story of Grimm's fairy tale. It is a classic of world fairy tales. Since its publication, it has had a very wide influence all over the world, and there are also series with the frog prince as a single story.