In this 2002 photograph, Sophia Sturtevant, 3, smiles at her mother, Tania Hathaway of North Yarmouth, after she participated in a children's parade at the Common Ground Fair in Unity.

Oxen at the Common Ground Fair in this undated photograph.

Crowds of people gather in line and past food vendors in 2015.

Dave Kennard's dog zigs to keep the sheep from zagging during a 2001 sheep dog demonstration at the Common Ground Fair.

Kitt Bartness whittles a new wooden figure as a large marionette hangs from strings at his booth on Sunday during the 32nd Common Ground Country Fair in 2008.

Common Ground Country Fair visitors look over the tomato entries in the Exhibition Hall at the Maine Organic Farmers and Gardeners Association in Unity in 2015. People travel from around New England for the education, entertainment and family activities that will begin this year on September 19 for three days.

Doug D. Hufnagel, 52, of Belfast sells coffee at his outcast coffee trailer outside the Maine Organic Farmers and Gardeners Association Common Ground Country Fair in Unity in 2000. MOFGA regulations prohibit selling food that is not grown in Maine.

Getting the ducks in a row: Border collie Rose carefully herds runner ducks at the Common Ground Fair in 2006. Runner ducks don't fly. The working dog was part of a herding demonstration at the Maine Organic Farmers and Gardeners 30th annual fair.

Enthusiasm for the Common Ground Fair caused traffic to slow and back up in 1999.

Emelia Linkel, 3, of Topsham pets an ox from and oxen team at the large livestock demonstration area at the Common Ground Country Fair in 2015. Emelia's mother Donna said that the animals are Emelia's favorite part of the fair.

A dollar bill that was stamped at a political booth in 2015 at the fair.

Russell Libby, executive director of the Maine Organic Farmer's and Gardener's Association, pounds nails on the roof of a cattle barn at the new Unity headquarters of the Common Ground Fair in 1998. The 35 acre fairground is shaped like a wagon wheel.

Fern Morrison, 2, (Left) and her sister, Kate, climb the fence to get a closer view of the donkeys at the Common Ground Fair in 1999. The girls and their parents came to the opening day of the fair from their home in Charleston, Maine.

Ashwood Waldorf School students, Jacob Lavi, 7,left, Louis Mainella, 8, center, and Melissa Lavi, 5, right, do their best vegetable impersonation while on a field trip to the fair in 2015.

Featured speaker Vandana Shiva, of India, receives a standing ovation at the Common Ground Fair in 2015 after speaking on the dangers globalization, including the effects of large-scale international agribusiness.

Opening day at the Common Ground Fair in 201. Fair goers (from left) Grace Clark, Lydia Clark, Ella Clark, of Fairfield, and Charlie Thompson, from Bowdoinham, watch sheep foot trimming demonstration at the fair.

A horse whinnies as Savannah Szumilas takes photographs in the livestock section of the Common Ground Country Fair in Unity in 2015.

A cyclist looks for his bicycle parked at the Common Ground Fair site in Unity in 1998.

One-year-old Eli Gundersen (left) and his brother, Lars, 3, of Winterport dance and clap to the music of The Maine Squeeze as they wander through the Common Ground Fair in 2000.

Isabella Gallant romps on a hay pile for jumping in the children's area in 2015.