Celebrate all things butterfly at the 12th annual Barbara J. Walker Butterfly Festival, happening Saturday, August 10, 10 a.m.-4 p.m. at Broad Meadow Brook Conservation Center and Wildlife Sanctuary in Worcester. 

Butterflies fly free in their natural habitats at this day of educational fun. Enjoy naturalist-led walks and workshops, live music, face painting, children's activities, butterfly garden tours, and up-close encounters with live caterpillars. 

Admission is $6, or $5 for Mass Audubon members. Children 2 and under are free. More information is here.