Pack of 9 white polystyrene foam balls with a 2.4 cm diameter, ideal for school science projects and creative modeling such as a solar system model. The balls feature a smooth surface that is easy to work with and can be painted, glued, or cut in half according to your needs. Made of high-density solid foam, they are lightweight, durable, resistant to dents and breakage, and free from any unpleasant odor, making them suitable for long-term use in various art and craft projects.