Called the Easy Fret, the tool clamps on to the neck of the ukulele and hosts a series of 3D printed “keys” that allow for complex chord shapes to be played with a single finger. In this ...

"Ukulele" translates as "jumping fleas," and Shimabukuro can make his fingers hop across the tiny fret board with the best of them. He'll appear this weekend at the Sounds of Hawaii festival.