When Tina LaRosa logged into a new Minecraft server this summer, she was a novice to the virtual world-building game.
But the 16-year-old high school sophomore was there for an important reason: to help launch a pilot of ExperienceCraft, a Minecraft server designed specifically with and for grieving youth between the ages of seven and 14.
The pilot was the product of a partnership between Experience Camps, a nonprofit that offers a one-week overnight summer camp for children who've...