And those kids ... inexperienced, no mortgage, no creditors, no "real world" responsibilities ... absolutely see it.
When someone builds something using the tools at hand and the experience they have, it definitely matters as to how old they are, and how much they've done. That shapes how you give feedback, both in style and content.
I know a lot of bright, intelligent, keen, motivated kids, and in every way I encourage them to go and build things that they think are relevant and important, even if I don't agree. The experience will shape them and make them better.