In a small bowl, add 8 drops of red food coloring to the peanut butter and mix well to make it more the color of a mouth.

Slice off the sides of the apple leaving a 1" section in the middle which includes the core.

Slice each of the sides in half and then cut out a wedge in each to make a mouth.

If you are making these up in advance, use lemon juice on cut areas of apple to minimize browning.

Fill the mouth with the colored peanut butter.

If your apples are small, only one row of teeth will fit.

Place the marshmallows, almond slivers or yogurt covered raisins to form one row of teeth on the top and then a row on the bottom (if you have room). If you are using marshmallows, allow them to sit open on a counter for about an hour to begin to dry out, so they are easier to cut.

Use scissors and cut diagonally to form sharp fangs or horizontally to make teeth.

Use a knife to trim almond slivers if you want a nice straight edge for teeth.