1. A calorie counting device comprising: a support structure, a plurality of activity pieces comprised of solid matter, each piece representing a level of human activity and having a weight approximately proportional to the number of calories expended by a particular type of person engaged in said level of activity for a particular period of time, a plurality of consumption pieces comprised of solid matter, each piece representing a number of calories consumed in food and/or drink and having a weight approximately proportional to said number of calories, a balance board balanced on said structure along a line on said balance board defining a center line, said center line defining two sides of said balance board, such balance board comprising a plurality of location means for easy placement and removal of said activity pieces on one side and said consumption pieces on the other side, and a scale means disposed on said support structure to indicate the net calories gained or lost during a time period or the net weight gained or lost during such period.