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Make Arm Great Again. Strengthen fingers, wrists, hands, forearms, shoulders, and bicep, etc. It also can be beneficial in promoting co-ordination and blood circulation. 2. The dominant hand/arm was easily able to keep the gyro ball going, that it will help refine you're fine motor skills in that non-dominant hand/arm. 3.

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Make Arm Great Again. Strengthen fingers, wrists, hands, forearms, shoulders, and bicep, etc. It also can be beneficial in promoting co-ordination and blood circulation. 2. The dominant hand/arm was easily able to keep the gyro ball going, that it will help refine you're fine motor skills in that non-dominant hand/arm. 3.

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