For the record. My kid doesn't believe in Santa clause and he is 9. But he still asked me if we can leave out milk and cookies...,cuz he knows I'll get up and eat and drink and he'll wake up to a couple of extra gifts under the tree that have santas name on them.....he's no dummy.
It also wouldn't make the children a dummy for believing it... I mean, they are just believing the people in this world who love them the most... For this reason, it's important NOT to lie to them... yes, pretend and play with them, but don't lie to them is all I've been saying. =/