To make streamers: Unroll 1 fruit snack roll and cut lengthwise into 1/4-inch strips with a knife and a straightedge. Roll each strip in a spiral around handle of wooden spoon. Store at room temperature at least 8 hours to set curl to make streamers.
After frosting cake, make 6 party blowers: Tint reserved frosting with food color. For each party blower, break candy stick in half. Cut a 4-inch piece from a roll of chewy fruit snack. Place a small amount of frosting 1/4 inch from broken end of 1 candy stick half. Wrap narrow end of piece of fruit roll over frosting. Pipe 2 rows of frosting stars over seam with decorating bag and star tip. Curl the end of the fruit roll to about 1 1/2 inches from star rows and secure with small amount of frosting if needed.