Hollow polystyrene balls in two halves which slot together. Ideal for floristry or craft projects. These polystyrene balls can be painted and decorated with a multitude of craft and modelling materials and can also be used as a base for clay modelling, papier mache or plasticine. Great for wedding decorations, hanging noveltys and table decorations. Use whole or split into halves. Waterproof and easy to use.