This is a re-post of a blog I did in 2016, but I think it's worth repeating.
We do the formal things people usually associate with spiritual people: We read directly from the Bible. We did not use devotional books though some, if using the Bible as a direct source, may be worthwhile. We Pray for guidance, protection, and provision from God and for the well being of others. We "Talk of these things while [we walk] in the way", we speak using the concepts we have learned from the Scriptures.
It's very important to be spiritual by example. What does it mean to be Spiritual, how do we know if someone is spiritual? We see what such people teach, they do good work, they witness (they tell others of the existence and providence of God and specially of Jesus.) They care for others. They seek God by reading the Bible, praying, having fellowship with other believers.
We train our children by telling them what good character is. To demonstrate to us they have learned, we make them tell us what a good character is. We make them show good character through their speaking and actions. We encourage them to do good works by telling them what good works are, and by doing good works ourselves.
We endeavor to be good examples because what we talk about and do, the children hear and see. We let them see by letting the Bible show us. After all, how do you know what the Standards are unless you read them? We let the Church show us and let others show us.