Prepare a baking sheet with parchment paper. Melt chocolates in the microwave at 20 second intervals until completely melted. Using a pipping bag or spoon, put large dollops of chocolate in random places across the pan.
Using a knife or lollipop stick, make swirling motions all over the pan to combine chocolates together.
While the chocolate is still melted, add decorative sprinkles.*
Place chocolate in fridge for at least one hour. Once it is set up, break into pieces and serve.