In a microwave, melt candy coating and shortening; stir until smooth. If desired, tint with food coloring.
Insert one lollipop stick into each marshmallow. Dip marshmallows in melted candy coating, turning to coat; allow excess to drip off. Roll in colored sugar. Place a dab of melted candy coating onto assorted toppings; decorate faces as desired. Place on waxed paper; let stand until set.