Time Out says
He knows how to make an impression, does Ay-O. As a member of the Fluxus movement in the 1960s, the Japanese artist (born Takao Iijima) encouraged gallery-goers to interact with art works by presenting them with a range of finger boxes into which they could insert their pinkies. The following decade, meanwhile, he earned the nickname ‘the rainbow artist’ when he started to paint works that depicted the spectrum of the rainbow in as many as 192 gradations. That's just some of what you can expect at the MOT's retrospective, which also promises to include an interactive installation and a new 30-metre painting.