Train them to be faithful and regular in attending church and the Lord's Supper.
Tell them of the duty and privilege of going to Church, and joining in the prayers of the congregation.
It is a sad sight in a church when nobody comes to the Lord's Table but the older people, and the young men and the young women all turn away. But it is a sadder sight still when no children are to be seen in a church, except those who come to the Sunday School, and are often obliged to attend. Let none of this guilt lie at your doors. There are many boys and girls in every city, besides those who come to Sunday School, and you who are their parents and friends should see to it that they come with you to church.
Do not allow them to grow up with a habit of making vain excuses for not coming. Make them clearly understand, that so long as they are under your roof, it is the rule of your house for every one in good health to honor the Lord on the Lord's day, and that you believe that the healthy person who refuses to go to church on the Lord's Day brings great harm to his soul.
The minds of young people are easily distracted, and their attention lost, and every possible means should be used to counteract this. I do not like to see them coming to church by themselves—they often get into bad company, and so learn more evil on the Lord's day than in all the rest of the week. Neither do I like to see what I call "a young people's corner" in a church. They often catch habits of inattention and irreverence there, which it takes years to unlearn, if they are ever unlearned at all. What I like to see is a whole family sitting together, old and young, side by side—men, women, and children, serving God as a family.