BANDON — It’s pretty hard to find a children’s play written for a cast of 14 girls and one boy.

Most are adapted from classic stories populated with an abundance of boys, and the few that slant female, like “Little Women,” tend to have few parts.

After seven years of looking and settling for creative casting, Dan Almich came up with a solution: He wrote his own play, “Monday at Noon,” which opens tonight at the Sprague Community Theater in Bandon.

“It was written because we have so many girls in our program and so few boys,” said Almich, the co-founder of New Artists Productions, which offers free drama education to Bandon youths. “I’m always asking the girls to play boys or someone much older.”

Almich said the idea for the play came out of a group discussion at New Artists’ summer workshop, which provided a frame that he combined with the plot of Agatha Christie’s “And Then There Were None.”

“I’m not an original writer,” Almich said, shrugging off the imagination necessary to create all new characters.

Almich replaced Christie’s troubled adults with a troop of Girl Scouts — unusual suspects for a murder mystery. There’s also a different ending, allowing for a slightly higher number of survivors than Christie’s title indicates.

A narrator, Omega the Timekeeper (Liza-May Skeie), resets the clock at the beginning of each scene as the play progresses through the 72-hour adventure of Girl Scout Troop 599.

Cathy Jones (Destyni Fuller), whose tribal heritage entitles her family to exclusive use of uninhabited Indian Island, has arranged for her troop to stay on the island for a fun-filled weekend of outdoor activities and earning merit badges. After departing the mainland at noon Friday, the 11 girls will be stuck on the island — two hours by boat from Oregon’s North Coast — with no way of communicating with the outside world until the ferry returns to pick them up at noon Monday.

Four days before the trip, a few of the girls gather to pack with Kim (Jeneveve Winchell), who is both committed enough to preparedness to make packing so far in advance not seem too ridiculous and genial enough to make plausible the others’ attendance at her packing party. Between school, diligent homework and resume-building extracurriculars, she’ll probably need the remainder of the intervening three days to get through several volumes of “The Worst-Case Scenario Survival Handbook.”

Others packing with Kim are Beth (Raven Braun), whose many phobias would probably keep her home from a rugged camping trip if not for the security wise Kim provides; chronic complainer Ann (Zeta Hay), an 80-year-old woman trapped in a 10-year-old’s body who will be lugging a bag full of pharmaceuticals for whatever discomforts arise; and gossipy Margaret (Rose Garrett), who needs captive ears while she dishes on the other girls in the troop. She’s not looking forward to so much time with “stuck-up” Janet (Ashley Crabtree) and “know-it-all” Nancy (Robin Hill), but they’ll probably be busy with other popular girls like Alicia (Alaina Russell) and Bonnie (Chelsea Hill).

Meanwhile, Cathy gives instructions to handyman Mr. Murphy (Russell Hay) and cook Mrs. Murphy (Clarissa Castaldi), who will staff Eagle’s Nest Lodge, her family’s vacation home, during the trip. The only other adult supervision will be from Scout leader Mrs. Jones (Larkin Madden), no relation to Cathy.

Cathy says she wants everything to be perfect while all her friends visit, but it’s not long after their arrival that everything goes wrong. At dinner the first night, one girl chokes; the next morning, two more are found dead, overdosed on sleeping pills and drowned in the bathtub. None of the bereaved girls has an appetite, except Pat (Tessa Fuller), who’s always hungry.

With so many tragic accidents in so little time, Mrs. Jones wonders whether the deaths are really accidental. But Cathy assures them no one else could be on the island, leading Erin (Hope Hay) to finger Mr. Murphy as the only suspect.

But after he meets a brutal end and the other adults are among four more victims, the remaining six girls are left to face the probability that the killer is one of them. And with 26 hours until the boat arrives, they’ll have to find a way to survive, even as suspicion tears them apart.

Directed by Almich and his wife, Anita Almich, the show runs through Oct. 27. Performances are at 7 p.m. Fridays and Saturdays. Tickets are $10, $8 for seniors and $5 for students.