Prepare icing and tint 1/4 cup orange, 1/4 cup green, 1/4 cup violet, 1/4 cup yellow, 1/4 cup brown, 1/4 cup blue, 1/4 cup black, 1/4 cup copper and 3/4 cup red; reserve 2 1/4 cups white (thin with 1 1/2 teaspoons light corn syrup). Ice cake smooth with thinned white icing and spatula.
Using toothpick, mark face areas, 4 3/4 in. deep from each star point. Mark party hat areas, 4 1/4 in. wide at base. Using wide end of tip 16, mark polka dot areas on party hats.
Use tip 18 and violet, orange, blue, yellow or green icing to fill in polka dot areas on party hats with stars.
Use tip 18 and green, yellow, blue, violet or orange icing to fill in party hats with stars.
Use tip 16 and brown or copper icing to fill in faces with stars.
Use tip 3 and black icing to pipe dot eyes and outline smiles on all faces.
Use tip 4 and violet, orange, blue, yellow or green icing to pipe pull-out pom-pom and brim on party hats.
Use tip 6 and red icing to print name.
Use tip 21 and red icing to pipe shell bottom border.
The star tip creates the most celebrated, easily accomplished decorations! The serrated edges of the star tip make ridges in the icing as you squeeze it out. Because fill in requires so much piping from the same bag, keep replenishing icing in bag.