Looks like a pair of baby doves. Since they're wild birds and, depending upon which species they are, may also be classified as game birds in your state, please contact your local wildlife department for advice on getting them to a proper wildlife rehabilitation center...it may actually be illegal for you to try and keep them even to help them, although I wouldn't blame you if you did.
Anyhoo, that said, baby doves are seed eaters. To feed them, get a box of budgie seed or finch seed (even some plain rolled oats will work in an emergency)...soak a bit of it in hot water and when it starts to soften, mash it a little bit with the back of a large spoon. Then very carefully pry their soft little beaks open a bit and see if they won't take a little of the sloshy mashed seed...just push a gob of it in with your finger. Once they get the idea, they'll peep and cry and wag their wings for more and you can probably feed them more mash with a syringe or just offer a spoonful of the stuff and they may push their beaks into it and gulp it down on their own...just be sure to hold the food above them. Another (messy) trick is to put some mash in your hand and make a fist and let the babies push their beaks into the 'hole' between your thumb and forefinger...this mimics how their parents would feed them, regurgitating cropfuls of partly digested grains while the babies thrust their beaks down the parents throats. I've pulled through baby pigeons this way and baby doves need the same care and diet, as far as I know. They're actually easier to care for than many baby birds because once their little crops are full of food, they'll be happy for some hours, and you can easily see when they're 'empty' again plus which they'll likely beg for more food as soon as they see you. Good luck whatever you do with them! They're cute little things and look pretty calm...a good sign for a bird you're trying to help.