Solar System Design: The exterior design of the solar system is more visually appealing to children. 10 planet ball toys in one set, including: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto, and the Moon. • Science education: An attractive and realistic appearance stimulates the imagination, making learning fun for students. It's useful for children to learn science projects at school and for teachers to use in the classroom. • Stress relief balls: These solar system balls are made of high-quality, elastic material. Use them to calm yourself when you're feeling anxious or stressed. They can also be used for hand rehabilitation and concentration training in children. • High quality: These solar balls are made of high-quality polyurethane, bouncing slowly when you squeeze them tightly, so they can be used for a long time.