Light Up Wrist Ball

Spin your way to stronger arms with this mesmerizing wrist exercise ball! Featuring a ball-within-ball design, this tennis ball-sized powerhouse generates up to 40lbs of gyroscopic force at speeds reaching 15,000 rpm. Simply wind the thread and pull to unleash the action—no batteries needed. Watch the built-in LED light intensify as it spins faster, making every workout session feel like playtime. Perfect for building arm and wrist strength, supporting recovery from RSI and carpal tunnel syndrome, or just enjoying an addictive fidget toy. Suitable for all ages and endlessly entertaining.