What is the first thing that the Creed states about Our Lord Jesus Christ? Why is it important that Christ is the Son of God? What does that mean for all of humanity?
Adam, who was made in God’s image and likeness, walked with God in the evenings right after the world was created. “Walking with God” is a metaphor that describes the union that first existed between God and man. Humanity was created for that kind of union with God. Unfortunately, very soon that union was broken. Adam and Eve’s sin disrupted it. Since that time, God has worked to reunite mankind with Himself. Jesus Christ, the true God and true man, achieved that reunion.
Our Lord Jesus Christ is the perfect human being. He is all God intended for each of us to be. He is Love personified. He lived his life on earth without sin and in complete union with God. His life, death, and Resurrection achieved salvation for the world. Jesus was truly God and truly man.
“Jesus Christ is the only proper Son who has been begotten by God, being His Word and first-begotten, and power; and, becoming man according to His will, He taught us these things for the conversion and restoration of the human race” (Justin Martyr, “First Apology 23,” 150 AD).
Try this: use a cup of water and a bowl of (frozen water) ice cubes for an object lesson that helps children think about Christ, who is God, taking on human form. (See page 5-6 of http://www.powermarkcomics.com/comics/pdf/Lesson%207%20-%20Seeker%20Series%20Curriculum.pdf for a detailed description of how to do so, complete with discussion suggestions.)