Dear Dr. Yael: I now see why so many children are insecure. I have been a day-care provider for many years. When parents initially consider day care they want a small group so their children will not be neglected. But problems arise when their children turn two, and nursery or playgroup becomes an option. All of a sudden a group of 20-25 children is not a problem because it is much cheaper. I refer to two-two and a half year olds, whose parents feel that they need to exclusively be with children their own age.