Spread a piece of parchment paper out on a cookie sheet, then set aside.
Put the cookies into a resealable bag and use a rolling pin to crush them.
Add the chocolate wafers to a small bowl and microwave according to the instructions on the package.
Once the candy melts are smooth, spread it out on the parchment paper so that it is about 1/4-1/2 inch thick.
Working quickly, sprinkle the crushed Oreos over the layer of chocolate, pressing them gently into the chocolate, then top with the sprinkles.
Refrigerate until the chocolate is hard.
Break the chocolate into pieces with your hands (some of the topping will fall off, but that’s ok).