You need to explain the saving/ investing aspect first, which is something that should be taught at a young age anyways.
I really wish schools did a better job of explaining basic economics/ banking/ investment.
That is definitely something teenagers could benefit from to help them in the real world.
Yes indeed kids nowadays are very advanced when it comes to technology. This would help the kids on how to manage their allowance and how to spend it wisely. Most kids are often buying toys or anything they want if they have money and that's a given because kids like to play but if we teach them how to save money rather and make some investment I think it would be very beneficial for them especially for their future.