These are the 10 day old chicks.
They have grown so much, the female no longer sits on the nest: there is no room for her! They will leave the nest and become fledglings at in about 6 days, when they are 16 days old.
And if you think that looks like bird poop on the nest, you would be right. As in most birds, when House Finch nestlings defecate, the feces are contained in a membranous sac. The parents eat the nestlings' fecal sacs for about the first five days. This is because most of the food has not been digested, so it is still nutritious for the parents. But as the nestlings get older they digest more, so most songbird species then stop eating the sacs and carry them away to dispose of them. But House Finch parents do not remove them, and the sacs accumulate around the rim of the nest.
References:
All About Birds
