BERKELEY — Wavy Gravy, the activist clown, former Ben & Jerry's ice cream flavor, hippie icon and self-proclaimed psychedelic relic, is turning 70, and he wants a birthday gift from you.

Gravy wants you to buy a ticket to a big-name concert May 20 that will benefit the Seva Foundation, a nonprofit organization that runs public health programs in India, Nepal, Tibet, Cambodia, Bangladesh and Tanzania to eliminate curable blindness.