ITEM NAME:Polystyrene Styrofoam Filler Foam Beads Balls Craft colorful 7-9mm A1Z5 Polystyrene Styrofoam Filler Foam Beads Balls Craft colorful 7-9mm A1Z5.Material:Polystyrene foam. Color: colorful. Also perfect for kids projects,as a educational foam ball can develop their imagination. You can make your own design and painting,really can give you more fun from this activity.