You don't seem to understand that people don't eat bantams. They're a miniature breed. They won't get very big. People won't eat them because they're not big breeds with a lot of meat. Judging by the picture, they aren't getting the care they need. They need bedding, the flat surface is bad for their legs. They need heat to keep warm. They need a constant supply of fresh food and water. They need their bedding cleaned regularly. Baby chickens are a lot of work.
What you should do is sell these ones. You CAN get money for them. You CAN request that its a local sale only so you don't have to drive an hour. The person you sell them to will take good care of them and they WON'T eat them. In the meantime, you need to read everything you can about taking care of chickens.
It's not fair to these chicks to be kept like this. You need to do the adult thing and give them to a new home. Read about taking care of chickens and once you're ready, you can try again.