Sing Hosanna! rehearsals for “Tarzan” begin Sept. 4 for those 12 and older and Sept. 14 for those 11 and younger at Stewart Hall, 310 W. Airport Road, Penn Township. The show runs Nov. 13 to 16. Call 724-586-0042.

Comtra Theatre, Route 19, Cranberry Township, presents the musical “Shrek” through Sept. 6. Curtain is at 7:30 p.m. Fridays and Saturdays. Tickets are $15 and available at www.comtratheatre.org. Call 724-591-8727.

The Red Barn Players present the comedy “Old Love” through Saturday at the Red Barn Theatre, Route 228, Franklin Township, Beaver County. Tickets are $12. Call 724-773-7150.Freeport Theatre Festival presents Agatha Christie's “Ten Little Indians,” also known as “And Then There Were None,” at 8 p.m. Friday, Saturday and Sunday at the theater on the Steele Farm, 2498 White Cloud Road, two miles south of Freeport off Route 356. Tickets are $15 for general admission, $12 for senior citizens and $10 for students. Call 724-295-1934 or e-mail Freeport_Theatre_Festival@comcast.net.