Keeping kids busy at a party

I'm planning my sons christening for the coming February and I we're going to have a lot of children there. Any ideas on activities/games I can set up to keep them occupied?

Re: Keeping kids busy at a party

I set up a craft table at my son's Christening. I had lots of paper, coloring books, crayons, foam stickers, etc. I also considered hiring someone (like a clown) to come for an hour or two to entertain them but decided not to.