You can usually find some lace fabric and lace trim on the discount tables. I used white hangers and white lace with white trim but there are many other colors too.
Parental supervision is recommended.
This project is rated EASY to do. With the hot glue gun, glue one piece of the lace fabric to one side of the body of the hanger. Turn the hanger so the hanger is laying on the lace fabric you just glued on. Now sprinkle potpourri inside the area of the hanger. Now glue the other piece of lace fabric on the hanger, sealing the potpourri inside the hanger between the two pieces of lace.