<prompt> Human: In one of my business classes that I am taking this year, our teacher told us that a good way to save money is to buy one of those prepaid cards that you can put money on at the store, ensuring that you only spend that much in a certain amount of time. I asked my parents if they could buy me one, but they said no. I was wondering if anyone knew how old you had to be in order to buy one, as I dont want to get denied at the store. I really want to try this and see if it actually helps me spend less, and see if anyone else can learn from it too.  <response>: There are better ways to save money. I wouldnt recommend one of those cards because there are fees associated with them. Open a bank account- student accounts usually have very low minimums like 200 and typically dont have fees until you reach a certain age 