The Christmas balls are hung from a wreath in expanded polystyrene.
We are going to decorate them in matching colors:
either by covering them in strips of metallic orange wrapping paper featuring a star design, to be fastened to a long gift ribbon wrapped all the way round the wreath
or by covering them in strips of fabric which will be fastened by means of pins thrust into the polystyrene
or else by painting it, as seen with the red glitter-covered polystyrene ball
The transparent balls are hung from a loop, the expanded polystyrene balls are hung from a long piece of ribbon tied for a 'gift wrapped' effect.