Basically, the situation is...
There is a group of older children and a group of younger children with the new child age-wise being in the older half. But, due to various issues with adjusting and ability, he doesn't always act as the older children expect. The younger group is more accommodating to him and so that's where he 'hangs out'. The older children are not quite as accepting and their interactions are not so positive. This mother would love to hear ideas about how to encourage her older children to be more accepting... understanding, patient, etc. with their new son.
See you here tomorrow.