We actually hang up their craft outside the nursery door, we use a rope and clothespins. With that we put a separate laminated picture, like a hand or a little girl, that also has their name on it. The parents get the craft and slide under the door their kid's laminated name. We pick it up and we take them to the door. Parents don't come in at all and, we are the ones that call each child to the door individually. It makes it so that other children don't escape and we can talk to the parent when they pick the child up in case that kid has had some kind of problem sharing, or hitting etc.  Our nursery leader, Cherie Tait, came up with this method. It takes a couple of Sundays for the parents to catch on but it pays off.