I think i had more spare cash when i was 12 than i do now.
I used o buy a multipack of chocolate bars (whatever had 5+1 free)for 99p and sell them at school for 30p each (this was the early 90’s). One pack a day turned into 3 or 4 per day
£3.20/day
I used to collect cans on a weekend from the local park where the pissheads got drunk, that then developed into a dog walker collecting them up for me as he was impressed i was doing what i was doing, then the park groundsman got wind of it and seperated all teh cans from his daily cleanup of the full masive park and from all the bins, so id have sacks full every week which my dad used to kindly stick in the van and take to alcan in MacDonalds carpark once a week or take them to the scrap yard. That brought in about £30 a week.
Had a pee easy paperround after school that brought in another £10/week.
I even used to sell conkers that the fat kids were too bone idle to go knock off the trees (the ones fished out the pond brought the premium prices as they would swell up loads!)
Cut grass, spent a summer walking every street in Leeds delivering 1000’s of ikea catalogues, free chocolate bar samples, chocolate rice crispies, doing soap powder questionaires door to door and fiddling teh results to get more commission, washing cars……..
I was minted!
Then at 15 i got a job in a bike shop, a bar glass collecting.
If you want a job, get dressed up smart/respectable and go round everywhere that employs people, ask to speak to the manager and tell them you will do what it takes to bring in some money.
Look them in the eye, firm handshake, think about what you are going to say and believe me you will have a job by the end of the day so long as you walk all over town and call in everywhere. Its not easy and you will be knackered by the end of the day (like us adults are after most days at work) but someone will think, you know what i like that kids style, ill give him a shot!