L.N.
If i were to be there please don't bring her :).
Yes, I get annoyed when kids attend something when they're sick, even with a slight cold.
BUT
I also realize I go overboard, so, yes, I would suggest keep an eye on him and if he doesn't develop a fever you can take him. Kids have colds all thew time. If it were up to me, all sick kids should stay at home until no symptoms are visible. But I don't live in that utopia.
:)