Set includes smooth 4 inch diameter polystyrene foam balls.These white balls are made of polystyrene , with bright white color lightweight and smooth, Can be painted glued, cut, sanded and pinned to make whatever you'd like. Excellent for painting and drawing£¡Use foam balls as Christmas tree ornaments, make Styrofoam Snowman, solar system, planet building, draw happy faces, eyeballs... Craft foam balls can be easily glued, make all kinds of 3D modelling, DIY School projects, DIY arts and craft home projects. Create party decorations with these balls Perfect for weddings, Christmas, Valentine's Day, baby showers and festive occasions. ARTS AND CRAFTS FOR KIDS - Unleash kids imagination. NOTE: be sure to test before using paint or glue.