Ample Quantity and Color: This package includes 12 stress balls, providing plenty for daily use or replacement. Great Performance: Each ball comes with a cover for easy cleaning. After use, the surface may attract some dust, reducing viscosity, but the stickiness will return after washing with water. Premium Material: These glowing balls are made of high-quality TPR material, soft and elastic, non-toxic and harmless. The stress relief ball is gentle and won't harm the user. Tip: If the ball you received doesn't glow in the dark, don't worry! Simply place the ball in a location with a light source, allowing it to absorb light for 3-5 minutes, such as sunlight or electric light. Versatile Application: Ideal for use in the classroom, home, or office, perfect for teachers, students, and anyone else. Great for stress relief for stressed employees and frustrated teenagers. Feature: Product Performance: They help adults and teenagers relieve stress and anxiety at work or school. The stress ball is soft and safe, strengthening family emotional bonds. This is a fun, relaxing, and entertaining toy. TPR is wrapped with silicone material, which is non-toxic and safe. Product Introduction: 12 glowing stress balls (random color) Notes: To make it glow, please place the ball where there is a light source, let the ball absorb for 3-5 minutes, such as in sunlight or electric light, and then glow in the dark. Washable, easy-to-clean surface. There will be dust on the surface, which will cause the viscosity to decrease, but the ball will become sticky again when rinsed with water. Due to manual measurement, please allow a slight deviation in size. There may be a slight color difference due to different monitors and lighting effects.