The Tree Frogs will be singing at “Chastaining at the Walters’ Barn,” a benefit for Elachee Nature Science Center set for Saturday at Jim and Peggy Walters’ barn in Lula.

But we’re not talking about amphibians.

Lavon Callahan, director of development and communications for Elachee Nature Science Center, said The Tree Frogs, an Orlando, Fla.--based rock duo, are “totally appropriate for the nature center” and will sing a variety of songs from the 1960s and 1970s.

Callahan said the Walters donated the use of their rural Lula property for the event. It’s dubbed “Chastaining” because folks are encouraged to bring their own picnic and drinks like they do at Chastain Park Amphitheater concerts.

But guests at the Walters’ barn won’t have to navigate metro Atlanta crowds to attend.

“It’s out in Lula, and it’s very rural, with rolling hills and pastures and just lovely shaded areas. And they have a large, large barn,” Callahan said.

If it rains, the barn will serve as a substitute for the outdoor pavilion where The Tree Frogs plan to perform, Callahan said.

Callahan said Elachee will provide “light appetizers and probably some (beer).”

Funds from “Chastaining” will benefit the center, a nonprofit organization that provides science education programs for school-age kids.

“We serve about 35,000 school children a year, who come to us from schools both here in Gainesville and Hall County as well as metro Atlanta schools,” Callahan said.

Callahan said you don’t have to be a member of Elachee to attend the concert.

“Just come on down, if you want to do a good thing for a good cause,” she said. “Just call and sign up or e-mail us.”