Butterflies flutter about our stomachs when we ride rollercoasters and frazzle us when we give speeches. Hawthorne compares them to happiness, quietly lighting on our shoulder if we're patient, while Nabokov intensely pursued and named more than 20 subspecies of the illustrative insect he called "intolerable bliss." Whether you see happiness or the universe in a butterfly's wings, you'll get your chance to view more than 1,000 this week in a 720-square-foot park-like habitat at the Fifth Annual Butterfly Festival. Hosted by the Kiwanis Club of Greater Plano at The Shops at WillowBend, the benefit for several area nonprofits runs May 3 through Sunday. Call 972-202-4900 or visit shopwillowbend.com.