Various simple Biblical coloring book pages actually celebrate the life of Jesus Christ and the apostles pages show Christ in different ages of - adolescent, youth, adult and his ending days. The parables pages are good coloring pages to relate with the stories of Bible.
There are so many online printable coloring pages that you can have a blast offering them to your children. Perhaps you don't have children of your own but you often have friends and family that come over with their young ones. You don't want the kids to be bored at your house. Allow them to pick some coloring sheets that you can print for them. Have crayons and other supplies on hand for them and they will feel very welcome in your home.