Stress balls are believed to improve your health by releasing tension as you use energy to squeeze them, causing you to relax. They can also help to relieve arthritis by strengthening muscles in the wrist & h&, this moon shaped stressball, is not only large & super squishy, but it will also glow in the dark, adding an element of fun. The perfect gift for those impossible to buy for people, who wouldn't think to buy one for themselves, but can't put one down after the first squeeze! NOT A TOY (not to bounced or thrown) Suitable for 8+ years Large 9.5cm diameter Glows in the dark