My parents bought my first car and my brothers. I got mine shortly after I turned 16 and my brother actually got his at 15. We didn't have the most fancy cars but they made sure it was nice and reliable. I am grateful for everything they ever gave us but my brother isn't like that. He thinks everything should be handed to him on a silver platter. Within a few months of my parents buying his truck he wanted something different. The rule was my parents would by our first car and help us maintain it as long as we were in school. I had that first car for 5 years and I just got rid of it. It was still running, but the AC unit went out. Kids just don't understand how hard it is to save money sometimes.
They will learn once they get out on their own.