There isn't a definite age that Christians are baptized. In some denominations, they are baptized as babies. In others, they are baptized usually around high school age, but are not limited to that age. For Christians who are baptized later and not as babies, it is a matter of personal decision, each person has a different time that they feel 'ready' to be baptized and declare their faith.
Some non-Christians are called 'atheists'. Some are called 'Buddhists; others are called 'Hindus'. Others are called 'pagans'. To my knowledge, the original Bible text does NOT call anyone 'pagan'. There are Jews and Gentiles; but both of them can become Christians.
disciples there were 12 In addition to the original 12 Disciples identified in the Gospels, all people through the centuries who have believed in Jesus or who believe now are called Christians. These followers of Jesus can also be called "the Church," "disciples," and "believers." The original 12 are also known as the Twelve Apostles or simply as "the Twelve."
A basin is a depression in the earth's surface that can be dry or filled with water.
The church priest baptizes the child normally after 40 days of birth. Catholics and some other religions believe that a child should get baptized after 40 days of birth. But Christians and other religions believe that the child should choose when to get baptized. We believe this because when you get baptized is to be reborn and all of the sins you have done in the past are forgiven. A baby is just a baby, they have no sins. So baptizing them does nothing. And they do not understand what baptizim is. Christians and other religions, think that the child should understand what they are doing, and sometimes people don't get baptized when they're young, some people in the Christian religion don't get baptized until they're in their 30's, the whole point is that the person decides when they're ready. Because nobody knows when the person is ready, except for that person. Each religion is different though.
The Sacrament of Baptism is how one becomes Born Again in Christ the Lord. When a person is Baptized, he dies with Christ; in the Tomb with Christ, & rises with Christ.
You are normally babtized once unless you do something or say something that makes you think you need to be babtized again and let god forgive you. So you can start fresh.
It is a cirque. Some contain what are called 'tarns', lakes of water that accumulates in the basin formations.
Some think the heathen population may have nicknamed them Christians out of jest or scorn, but the Bible shows that it was a God-given name; they "were by divine providence called Christians." (Acts 11:26)
Some basins are:The Kalahari BasinVictoria BasinTidal Basin
I believe that you are referring to icons, as used in the Orthodox church.
Some Christian sects allow it, some might not.