Popping the Bubble: Preparing Kids for the Secular World

Today's question says, "I have three kids, ages five, seven, and one. My husband and I feel strongly that we want our children to have a Christian education, private school, or homeschooling. However, I don't want the real world to hit them like a ton of bricks when they graduate high school and leave the Christian school bubble. You have given some great ideas on other podcasts about analyzing movies, shows, and music from a biblical worldview, but I was curious if you had any other age-appropriate practical ways to expose our children to the secular world as they grow without destroying their innocence?"