Walking guided tours of downtown Butler are being offered. A walking tour of McKean Street will be from 1:30 to 3 p.m. Sept. 16,with a starting location to be determined. Cost is $10 for adults and $5 for children 12 and younger. To reserve a spot, call 724-256-5769; e-mail info@butlerdowntown.org.

Harmony Museum, Mercer Street, Harmony, has tours from 1 to 4 p.m. daily except Mondays. Call 724-452-7341 or 888-821-4822, or visit www.harmonymuseum.org.

Phipps Conservatory and Botanical Gardens at One Schenley Park presents its eighth annual Red, Ripe and Roasted tomato and garlic festival from 11 a.m. to 5 p.m. Sunday. The summer flower show continues through Sept. 30. Phipps is open daily from 9:30 a.m. to 5 p.m. and until 10 p.m. Fridays.Carnegie Science Center, North Side, will feature Rick Witkowski of the B.E. Taylor Group and Kelsey Friday of Kelsey Friday & the Rest of the Week playing from 2 to 3 p.m. Saturday as part of the exhibit “Guitar: The Instrument That Rocked the World.” The science center is open from 10 a.m. to 7 p.m. Saturdays and 10 a.m. to 5 p.m. Sundays through Fridays. Call 412-237-3400.Heinz History Center, 1212 Smallman St., is displaying nearly 50 paintings and sketches depicting the lives of Negro League baseball players as part of “The Story of Negro League Baseball: We Are the Ship,” through Sunday.