Cut the box open then cut the walls into individual sections.
Using the heart you just cut, trace it on another section of cardboard. After it has been traced, cut it out. You should now have 2 hearts. These will be the front and back of your heart pinata.
Roll your flap so that it will become more flexible. These flaps will become the walls of your pinata.
Once you have taped all of the flaps around the perimeter of the heart, grab your second cut out heart.
With the foil that you have (we ordered ours from dickblick.com) cut strips of it and fringe the strips.