Pour the flour into a bowl and compress it. Put a plate over it and carfully flip it over so that when you take off the bowl it leaves a mound of flour in the plate. Put an M&M in the middle. Go around the circle using the knife to make one cut at the flour trying not to cause the M&M to fall over. Eventually there will only be a pillar of flour holding up the M&M. the person that causes the M&M to fall has to pick up the M&M with their teeth.