In advance: Make cookies. Prepare and roll out dough. Cut party hat and letters for name using cutters from sets. Bake and cool cookies. Tint light and dark shades of rose, green, and orange color flow icing. Use full-strength icing in darker shade to outline cookies with tip 3; flow in with thinned icing. Immediately pipe dots using cut bag with thinned icing in lighter shade. Let dry 24 hours on waxed paper-covered boards. Attach two lollipop sticks to back of hat cookie with fullstrength
icing. Let dry.