In advance: Using royal icing, figure pipe kids with tips 2A, 3, 5, 8, 12, 16 and 349. Make trees using royal icing: Place cones on waxed paper. Cover cones with tip 16 pull-out star branches, piping from bottom up. Using royal icing, make campfire: Position mini pretzels in a circular stack on waxed paper. Pipe tip 349 pull-out flames. Let all dry.