If you can't catch them you'll have to use a trap. Their only hope (other than being feral) is to be handled by humans at a young age. Better handle them now before they get big enough that you can't handle them.
I have a cat I raised from a feral kitten. I found him sick in my back yard. He was near death or I would not have been able to catch him. He still will not have anything to do with any human other than me.n Since they are still young I would trap them and handle them as much as you can. Then they will be adoptable. if you can't catch then just use the food to get them closer and closer to you by sitting with the food far away and them slowly every day move it closer and closer. You will eventually be able to touch them. Good Luck!