marshmallow fondant (I personally haven't tried to make it but a friend did and loved it) Google recipe.
I looked up the recipe maybe I'll try it today (i'm a little scared of the recipe it looks hard)
Chocolate dipped Marshmallows (put a craft/lollipop stick in marshmallow, dip in melted chocolate, roll in sprinkles. Put on waxed paper to harden).
Great idea and easy too
I too have a lot of marshmallows on hand, jumbo sized and a warehouse size of minis that I was going to use for Snowman Poop at Christmas and never got around to it. Will probably make the Rice Krispy Treats, though...