Original Xiaomi Youpin Yunmai Wrist Trainer LED Gyroball Essential Spinner Gyroscopic Forearm Exe...

1. Led flash - The LEDs increase in intensity the faster that you get the revolutions going. At least gives you a general indication to how fast you have the gyro spinning. The blue LEDs getting brighter.
2. Motor skills- This certainly requires some fine motor skills in order to use. The dominant hand/arm was easily able to keep the gyro ball going, that it will help refine your fine motor skills in that non-dominant hand/arm.
3. Easy to use - Simple to start with a pull-string. Impact resistant structure with military-grade plastic shell. The more exciting part is, this exercise ball lights up when it is spinning! And the LED light is not powered by batteries. It is battery free. No need to worry about power running out. It will keep lighting up as long as it is spinning.