Friday-Sunday, it’s the annual run of “Amahl and the Night Visitors,” presented by Twelfth Night Productions at Youngstown Cultural Arts Center – four chances to see the show. And this year’s run is a special anniversary for brothers Jeffrey and Michael Thoreson first appeared in Amahl and the Night Visitors 40 years ago this month. It was a production at First Lutheran Church of West Seattle at the time – then in the late ’80s, most of the cast reunited to do the show again, and the brothers have done it every year since – part of the Twelfth Night presentation for the past 13 years. It’s been a family affair in even more ways – early in their stint with Twelfth Night, their dad David played the third king; many other Thoresons have been onstage or in the orchestra over the past 20 years; and this year Jeffrey’s son Hans plays Amahl for the second year – though it’s his fifth year with the production, debuting as a shepherd at age 5. We asked about memorable moments for the brothers; they said, working with their dad, who really took to singing and to playing to the audience but retired from performing after a few years. He’s returned to see his sons over the years, and the brothers say he’ll be there this weekend. “Amahl and the Night Visitors” will be presented at 7:30 Friday and Saturday, 3 pm Saturday and Sunday, and there’s a special deal – go to the WSB Coupons page to print out the coupon for 20 percent off any adult admission at the box office.