Language learning resource
Consider "adopting" a college student, or couple, from a Muslim nation. Their brief stay here might be their only chance to interact with happy, functioning, Christian families. If you study the language, you will have a superhighway into their hearts. Your kids will also learn valuable lessons about grace and election -- those outside of God's saving grace (at least for now!) can be wonderful, charming, people. It's done our girls, 11 and 13, a lot of good to have surrogate big sisters to pray for.
And yes, they are making slow but steady progress with their Turkish lessons.