Kusama has suffered since childhood with depersonalisation syndrome, which induces a heighted, dreamlike state of unreality and disconnection from one's self and the world. Kusama's visual art is mostly dominated by vibrant polka dots, which to adults communicate the hallucinations she has endured most of her life; but, being simple, playful and familiar, they conveniently double as a means of engaging children in a hands-on learning environment.
(From State of the Arts magazine).
This is a sweet and fun site for kids. Go to www.qag.qld.gov.au/kids to play the game.
A biography of Yayoi Kusama can be found here.