Thin royal or color flow, adding 1/2 teaspoon water per 1/4 cup icing. Icing is ready for flowing when a small amount dipped back into mixture takes a count of 10 to disappear. Add additional water as needed.
On waxed paper, pipe a ball, 1/4 to 1-1/4 in. diameter depending on project instructions, using thinned icing in a cut parchment bag.