Creativity is characterized by originality of thought or inventiveness and shows imagination and progressiveness. It involves mental ability and curiosity to come up with a new idea, product, process, …, development of a new model or theory. At the bottom end of definitions, creativity involves going beyond current boundaries of technology, knowledge, current practices, social norms, or beliefs. But many people would tighten up this bottom end definition somewhat, to insist that some real genuine originality is involved in extending the boundaries, and not just some minor tinkering (for example, changing the color) or doing something different following an exhaustive compilation of what everyone else has done to date (for example, no one may have whistled the national anthem backward).