Brush cut apple surfaces lightly with lemon juice to slow browning.
Spread about 1 teaspoon of peanut butter along the straight-cut edge of one apple wedge.
Press 4 to 5 miniature marshmallows into the peanut butter in a row, spacing them to look like teeth.
Top with a second apple wedge, pressing gently so the peanut butter acts as glue and the marshmallows are visible between the two slices.
Repeat with remaining apple wedges to make 12 to 16 vampire teeth sets.
Arrange the finished teeth on a large board, standing them on their curved side so the marshmallows are visible.
Surround with celery sticks, pretzel rods and a small bowl of extra peanut butter for dipping.
Serve within 1 hour to keep the apple slices fresh.