Baptism is for those who profess a belief in Jesus Christ and can testify to the basic tenants of Christianity in their own lives. We baptize by immersion as it points to our death and resurrection in Jesus.
In a family, baptism of children is often performed by their earthly fathers. Others may choose to have a pastor, elder orspiritual leader perform the baptism. Those being baptized may ask a close friend or mentor to read their testimony.