Now, more than 2 months after the surgery was performed, Kepner displays no signs of rejection. He has only limited use of the new hands, because the muscles are still stiff. He can slightly squeeze a tennis ball, move stacks of cones around, and even play Connect-4. He's got a ways to go, though, as the nerves only regrow at a rate of about an inch per month. But in a few years, he might be able to function as he once did over a decade ago.