I am using communal computer & have difficulty copying & pasting your long post, so will try to answer in this format. --> no prob. Thanks for the effort

Can we assume modern times? Relevant where the scene took place? USA? Europe? Asia? Others? Technology relevant?
Is the speaker referring to all the children? Are there more than 5 children? Are the children expected to be there? Are they on strollers? Are they aligned in a row? Are they standing? Sitting? Are they in a relevant building? Theater? Hotel? Clinique? Restaurant? A movie scene? A room in a house? A building where people usually bring the children? Asylum? A school? playground?
Sport activities relevant?
Does the speaker usually work with children? Is her work connected to children? To teeth? To costumes?
Is the speaker a babysitter? Is she supervising the children? Controlling them one by one? Entertaining them? Did the speaker saw the milk teeth of one child? Of all the children? If so, relevant how? Are the children performing some actions involving their teeth? Involving their teeth and that adults not having milk teeth could not perform?
Is thee speaker speaking loud? Relevant? Is someone else present nearby a part from children?
we are not talking about 'normal' children --> adopted? Abandoned? employed as doubles in movies? employed in advertising? having a relevant social condition (e.g. price that need to be dressed)?
Is anything like living nativity scene relevant?