Pain in the rear to count out the m&ms total) but everyone loved it so I would suggest it at any shower. When they are passing the bottle around to guess is a great time for people to introduce themselves.
25 Perfect Spring Baby Shower Ideas - Lots of friends are having babies this Winter/Spring! I may need this later. Someone could buy the mother to be a rocking chair and designate it her special seat at the shower in the middle of everyone