I have the first cold of the season swooping through my little group right now, so I hear you! However, for parents, it would be impossible to keep their child home every time they have a cold or the child might be home for most of the winter! I think if there is a fever or if the child is not well enough to take part in regular activities, you can send them home. I have that in my policy. As a parent with young children myself though, I am patient with these things because if it is my own kids, I cannot close the daycare or have my husband stay home every time they have a cold either. Only if they are too sick to go to the park, etc.