Punch 180-200 of the hydrangea petal shapes, which will take around a sheet and a half of 12×12 scrapbook paper.
After the shapes are all punched, curl the edges of the petals upward and to the center. This will give the flowers some dimension when they are complete.
Stack two of the flower petals and turn them a bit so it looks like a full flower. Stick a corsage pin straight through the center of your petals.
Push the end of the pin into the Styrofoam ball, the repeat until your ball is covered.
Tip: Start by making a row around the center and filling in each half a concentric row at a time. Make sure your flowers are close enough that the petals cover the Styrofoam. Optional: Place in a bowl or with ribbons pinned among the petals to hang them.