Alleyne-Johnson performing on the streets of Chester, England. [youtube:http://www.youtube.com/watch?v=vUO6kYLb6As 468 310] 3. Tenori-On (Image via: Yamaha ) No, this isn’t the first good-to-go version of Minesweeper : this baby is for making beautiful music with.  The 16 x 16 grid of LED lights on the Tenori-On responds to touch and to