Yellow fluffythings. That's totally it.
Seriously though, no idea. Maybe wait until they're fully feathered, then we'll have a better guess. They sure are cute!
There are a lot of chicks with that coloration...they could be Buff Orpingtons (but usually not with the black smudges), MIGHT be White Rocks as those can get smudgy as chicks but come in white feathered, MIGHT be New Hampshires, as they are buff as chicks and have black neck and tail ticking and will come in golden orange on the body feathers. Might be Buff Rocks (although more rare).
MIGHT...be a lot of other things.
Where did you get them? Were they layer assortments? Games? (They look like a layer type from the photos...ie the wings are proportionate to the body...games have to grow into their wings).
if we are still talking about the two on the left...Gold Stars aka Gold Sexlinks aka Red Sexlinks aka Cinamon Queens...a hybrid between a red/gold based roo, often a New Hampshire, and a silver based hen, often a Delaware.
They lay large brown eggs profusely and are good natured birds. Sex linked colors are only for the first generation..they are not a breed and therefore do not breed true. I can't tell if they are first or second generation but if you got them from a feed store, they should be first generation.