Where can you buy plastic foam balls?

Huge Styrofoam balls can be purchased at Michaels craft stores either in store or online. Amazon sells huge Styrofoam balls online. Shape Innovation, Inc. sells Styrofoam balls and practically any size desired is available for order. They sell many sizes through Amazon but special orders should be placed directly through calling them to avoid service fees. Their toll free phone number is 800-224-3036.