Punch out many paper flowers from pastel cardstock using a flower paper punch. Make a hydrangea pomander using just one color or several.
Stack two paper flowers on top of each other, positioning them so both layers of petals are visible from the top.
Pierce both flowers through the middle using a pearl-headed pin.
Push the pin, which holds both flowers, into the Styrofoam ball.
Repeat Steps 2 through 4, positioning the flowers so no Styrofoam is visible between the flowers.