Material：Each ball is made from polystyrene and is sold and have no holes or markings. The foam has a high density so will not mark, dent, break. 24pcs 6cm foam ball. White Polystyrene Balls: You can make so many seasonal, festive ornaments for all occasions and celebrations. Use them to make Christmas baubles, wreaths and decorations for your home. Solid Sphere Foam Balls: These balls are lightweight and can be used for many different arts and crafts projects. You can stick sequins, lace, wool, origami, petals and beads to them or fix them with pins. Smooth Round Balls for DIY: You can also drill holes into them. Our craft balls can even be painted or sprayed if you want to change the colour. They are so versatile and this is why they are great for DIY. Wide Application: for crafting projects or various decoration in different situations, such as party, Easter Day, arts, household and school projects.