DescriptionThis is for those who like to find themselves fidgeting with things such as twirling pens or rolling coins over their knuckles. Great for kids exercising their hands and anyone with ADHD. It allows those to fidget with something while not distracting others. These are perfect pocket pieces for people wanting something small, simple, discrete and fun-also effective for focus, stress relief and deep thought.Features- Color: Black. - Material: ABS. - Size: About 7 * 7 * 1cm/ 2.8 * 2.8 * 0.4 inch(LWH). - Great for Fidget, Anxiety, ADHD, Autism, Staying Awake and other attention disorder issues, like nail biting, smoking, leg shaking, etc. - Glowing in the dark-Please note that the glows in the dark with green color, while it's grey color in the daylight. And please put it under a bulb or light before using, then it will be glowing stronger. - A good choice for killing time, helps relieve stress. - No Repair, oil, maintenance needed! Use it right out of box. - Round Corner and Soomth Surface - Protect your fingers from scratching.