At least 1 day in advance: Make cookie and ice cream stars. Roll out dough just under 1/8 in. thick. Cut cookies using 2nd largest star cutter; bake and cool. Using serrated knife, cut ice cream into 1/2 in. thick horizontal slices. Cut stars using 2nd largest cutter. Sandwich ice cream stars between two cookies. Insert cookie stick and freeze a few hours until very solid.

Remove from freezer and coat bottom cookie with melted candy; let set. Turn sandwich over and place on cooling grid; cover with melted candy. Freeze until firm.

Position stencils on sandwich tops. Lightly spread melted candy over open areas; immediately sprinkle with colored sugar. On edges of stars, pipe melted candy in cut parchment bag; immediately sprinkle with blue sugar. Tie curling ribbon onto sticks. Place sandwiches in treat bag; wrap and freeze until serving.