It is difficult to say regarding skin conditions without seeing the good quality pictures. 2 most common illnesses in this group as per your decription are Hand , foot mouth disaease (http://mayaclinic.in/patient-education/hand-foot-and-mouth-disease-hfmd/) Atopic dermatitis (http://mayaclinic.in/patient-education/rashes-over-face-in-children-it-could-be-atopic-dermatitis/) read on the links to know more about these condition and show to Dermatologist nearby. Skin specialist will guide you much better. Meanwhile you can like and follow my facebook page for updates regarding general health of children. (https://www.facebook.com/mayaclinic.in/ )

Ok. It's very difficult to come to conclusion without seeing those rashes. But the way it's been distributed according to your description, looks like hand-foot-mouth disease. It will take time to resolve, say 2 to 3 wks.