Behold what manner of love the Father has bestowed on us, that we should be called children of God! Therefore the world does not know us, because it did not know Him. Beloved, now we are children of God; and it has not yet been revealed what we shall be, but we know that when He is revealed, we shall be like Him, for we shall see Him as He is. (1Jo 3:1-2 NKJ)
Children of God in that we bare the image of God, and that has and is being restored so that one day when we see him, we shall be like him.
So as a child of God we should be about the Fathers business, what is that? First, we should be wanting to spend time in the Father’s presence, through prayer, the Word, and worship, reflecting back to God the image and the glory of God. Next, we should be taking care of God’s business here on earth. Taking care of creation, and the environment, peace and justice for everyone, and ensuring that the policies and politics of man align with the Word of God.