[Symphony.]

Hello,
So I posted a thread about this maybe last month and I feel bad about posting again, because I did appreciate all of your advice, but I felt I left details out and I wanted to see if I could get some more answers as well.
Warning: this is likely to be a very long post.
So, basically, I'm attending a concert for my favorite artist in September, near the end. And all the merchandise at this artist's shows are always really cool, and as I'm a big fan I want as much money as possible to spend. The money I currently have is going towards what I'm planning on wearing to the show, so I basically have nothing. My parents said theyd give me some money but I still wanna buy more, because it'd be rude of me to ask for anything more than about $40 bucks or so, and since money's tight they might not give me that.
I'm too young to legally have a job and have no items currently that I could sell. As far as what I can and can't do goes, I can play the flute and sing a little bit, but I'm not amazing at singing. I wouldn't be allowed to go out and play my flute on the street like someone suggested last time, and I also live in a very suburban area anyway, so there isn't any busy place close by. I can't drive. I can make jewelry but it would be very difficult for me to sell it as I don't really have any way to, and I can't sign up for a craft fair because that has to be done months in advance and would be much too stressful for me, even if I were to take orders at the fair itself and make the orders there, if that makes sense. I'm not good at math or science, nor am I athletic. I'm decent at English and could help someone out with a little bit of musical theory. Tutoring is a no because there aren't really kids in my neighborhood to tutor. Babysitting bugs the hell out of my anxiety so I'd really rather not, and dog-walking is kinda out of the question because it's been really hot where I am. I can't post stuff about asking my friends to buy my jewelry on Facebook or anything because, to be honest, most people I have added on Facebook don't like me enough that they would even consider it.
So, basically I'm stuck. Any suggestions?