1 day in advance, make cookies. Prepare and roll out cookie dough following recipe directions. Use egg cutter from set to cut six cookies. Bake and cool.
Prepare Color Flow icing following recipe directions. Tint portions orange, blue, yellow, violet, light rose and dark rose. Reserve a portion of white.
Use tip 3 and white or tinted icing to outline cookies. Let dry 5 to 10 minutes.
Thin portions of each color. Use thinned icing in outline color and cut disposable bag to flow in cookies. Let dry 24 hours. Reserve remaining full-strength icing.