These infinite cubes are made of safe and friendly materials, which can relieve stress and increase concentration. They are great toy for those with ADD, ADHD, autism or anxiety, and are ideal for students, no matter waiting in the amusement park or in the waiting room, these infinity cubes can keep the fingers turning, relaxed, noiseless, compact touch, endless cube, so that waiting in line is no longer boring, allowing you to easily carry it wherever you go, take it out, and have fun anytime.