They look kinda like my White Leghorns did as chicks. Or maybe a White Plymouth Rock?
But I am no expert. Put them on the thread about what breed/sex is my chicken and someone will probably know. Do you have any more recent pictures?
VERY cute little babies you have here! I am very intrigued by the feathers on this breed's legs. I have boring ol' Leghorns & 2 SLWs that are still growing and haven't made it to the 'pretty' stage yet.