Party game ideas for 3 year olds?

I've just spent a very unsatisfying lunch hour scouring the interwebs for party-game ideas for three year olds. When will I ever learn that all I need to know about life I can find out by asking my bloggy friends?

There will be six kids, ages 10 weeks, 2 years (two of them), 3 years, 5 years and 6 years. Okay, safe to say that baby Brooke will be happy to simply look on while the other kids play.

Any ideas for simple games that can be played in a relatively small and crowded (with onlooking adults) space would be greatly appreciated!