Abstract: A powder for use as a toilet training aid changes from substantially white to a non-white color upon contacting water. The powder-includes at least one powdered water-soluble color additive, and at least one salt for providing a uniform dispersion of color from the color additive when in contact with water. The salt is preferably selected from the group consisting of sodium bicarbonate, sodium chloride, magnesium sulfate, and magnesium chloride. The color additive is preferably a water-soluble powder certified by the United States Food and Drug Administration for use in drugsand cosmetics or for use in food, drugs and cosmetics. After repeated use, the child develops a positive mental association between the act of using the toilet and the amusement derived from watching the change of color, thereby making toilet training easier.