For the 20th anniversary of the Minneapolis Sculpture Garden, Walker Art Center is going green, with two new artist-designed mini-golf courses and a special outdoor exhibition, "Design for the Other 90%."

Created by artists, architects and designers, the golf courses have seven holes each, including a water hazard, an "island of plastic," a 12-foot-tall Paul Bunyan statue, a "wave" covered with recycled glass and a hole that operates like a Japanese pinball game. There's even a golf shack selling refreshments from Wolfgang Puck's Gallery 8 Cafe.

The exhibition is equally innovative, featuring clever and inexpensive products designed to solve common problems that confront the 90 percent of the world's population that lacks access to such essentials as clean drinking water, health care, education and shelter. Equipment ranging from a solar-powered battery to a water-purification straw are installed in the museum's lobby and eight shelters in the garden.