No big noise: Easy to carry, small, simple, discrete and fun, also effective for focus and deep thought. Fidget hand spinner: 1-3 minute average spins great for fidgety hands, add & ADHD sufferers helps relieve stress. Great bearing: Ceramic center bearing, SLA technology, laser industrial molding technology, resin materials, accompany you year by year. Hold spinner in one hand and use the other hand to spin it rapidly using small continuous strikes to keep it spinning indefinitely with practice.