Karina Smigla-Bobinski: helium sphere drawing

ADA – Analog Interactive Installation a kinetic sculpture by German-based artist Karina Smigla-Bobinski ... an enormous helium-inflated sphere is trapped inside a small room .. spiked with dozens of protruding charcoal pieces which scrape the edges of the gallery wall .. participants push, toss, and otherwise manipulate it...a single outcome..is destined to emerge..requiring the participation of dozens if not hundreds of gallery visitors (edited text - source here)

photo credit: here