Line a baking sheet with parchment paper and spread a layer of broken graham crackers over it.
Melt chocolate chips in a microwave-safe bowl in 30-second intervals, stirring in between, until smooth.
Pour melted chocolate over the graham cracker base and spread evenly with a spatula.
While the chocolate is still soft, sprinkle marshmallows, crushed Oreos, crispy rice cereal, chopped Kit Kats, and peanut butter cups on top.
Add candy corn, gummy worms, eyeballs, sprinkles, nuts, seeds, and any other toppings.
Gently press toppings into the chocolate with your hands or the back of a spoon.
Optionally, drizzle caramel syrup or additional melted chocolate over the top.
Chill in the refrigerator for 1 hour or until completely set.
Break bark into uneven pieces using a sharp knife or by hand.
Store in an airtight container at room temperature or in the fridge for up to 1 week.