1905-10,all wearing summer clothing.
10 children predominantly girls with the eldest at the back who looks about ten as does the boy next to her.The next eldest at the front looks around seven & then they go down to a few months old.
Almost certainly the married couples are on the extremes of this but not so sure about the chap in the middle & the lady next to Grandma.There was a certain amount of balancing out in group photos so difficult to say who the children belong to or whether these women are daughters or in-laws although the woman on the right has very similar facial features to Grandma.
jim