Normally I just cope, put them on the couch, keep the play as low key as I can without spoiling the fun for the others. Putting the child down for a morning nap. Adding in some tv time for some breaks. That is one of the things we just have to cope with in daycare but you don't have to tolerate if that makes sense. As in child can come but if he cries he goes to bed. If he is falling asleep in meals then for sure he needs a morning nap. That isnt' uncommon after getting over an illness since the body needs time to recover and kids tend to overdue it when they are with their friends.

At the same time watch him for secondary infection - a cold that seems to be gone can also migrate and become an ear infection or the nose can be getting restuffed as in another round is coming. It takes up to 14 days to get over a cold so normally kids only stay home 1-3 of those days when it seems at it's worst and we cope on the days either side of that.