There are many examples of Christian object lessons online for ideas. Lessons that teach about self esteem, thoughtfulness, sharing, temptations, cheating, and other daily challenges young people face are available.
The story of Jesus walking on water is a lesson where youth learn that it is best to keep your focus on Jesus. Peter asked to walk on water and could do it until he put his focus on the storm.
Well, a few good ones would be about sex out of wedlock, and the full meaning of the 10 Commandments. They are both very good topics to talk about with youth.
Jesus showed compassion for the sick and the poor. He showed that He hated the sin, but not the sinner. He observed the Sabbath Day. He fed the people with the loaves and fishes when they were hungry and had no food. He saved the woman when she was about to be stoned. He showed love for children.