The children can not overlap. So she takes the risk of a bus running late or dropping off early if she has a set of daytime children and a set of school age children. The law will not distinguish a late bus from a caregiver purposely with too many children. But yes, a caregiver could have a full set of school age kids and a set of daytime kids that come and go during the school day.

I would think the reality of pulling that off are mighty slim. There are not that many families looking for care from 9-3.