How do 12 year olds make money in winter?

You could shovel driveways, ask older people if they would give you grocery money so you could buy their groceries for them, walk people dogs (nobody wants to do that in winter),sell cookies,do odd jobs for your parents and other people. And also if you are really good at something like painting, soccer,etc you can offer to give lessons to people. you could offer to babysit animals if someones family is going away for Christmas.