Wash all of your fruit and dry it with a paper towel.
Slice the tops of the strawberries.
Slice the bananas into 24 pieces.
Thread one grape, one banana slice, one strawberry with the narrow end facing up, and one marshmallow onto one toothpick to resemble the Grinch's head in his red hat.
Repeat with remaining grapes, banana slices, strawberries, and marshmallows.