I like the answer , but i think she or he can go with buying any full member account and start earning through signature campaign. this is also one way of earning without risk
Any teen has enough time to get a full member account in his/her own. No need to buy it, just be patient.
What time scale are we talking about here? Teens are in the age of needing money they don't have. In 20 years he/she won't need $1k, so unless it's gone up a lot, $1k means more to the kid now than it would mean to the adult in the far future.