This half styrofoam ball is the perfect base for a multitude of arts, crafts and floral design creations. It is made from a very lightweight foam material for easy use. Styrofoam is great for model building, craft projects and other creations. Styrofoam is a very lightweight and porous material that can easily be painted, shaped, sculpted or cut. You can use is for kids crafts, holiday decor or party decorations.