Interactive activities included in galleries like Sound Lab and On Stage where visitors can explore hands-on the tools of rock and roll through instruments, and perform music before a virtual audience. IF VI WAS IX, a guitar sculpture consisting of more than 500 musical instruments and 30 computers conceived by UK exhibit designer Neal Potter and developed by sound sculptor Trimpin. [2][3] The largest collections in the world of rare artifacts, hand-written lyrics, personal instruments, and original photographs celebrating the music and history of Seattle musicians Nirvana and Jimi Hendrix.