You can use a variety of items to decorate the jelly container. Mas. Arya Mandar Nadgaundi suggests using glitter, lace, and any other decorations you want. Don't forget to find something special for the 'centerpiece' of the brooch.
To finish the brooch, cut a piece of cardboard to cover the opening. This will be the back of th brooch. Attach a safety pin or pin backing to the cardboard.