First line a baking sheet up with some parchment paper.
Then you're going to want to put your chocolate melts in to a microwave safe bowl. Then put them in the microwave until they are all melted. I usually do 30 seconds and then 10 seconds more each time until it's melted.
Now pour the chocolate over the parchment paper and spread it out. You can do this however thin or thick you'd like. I like mine to be a bit thinner.
Next you want to add the sprinkles over the top of the chocolate. Just sprinkle them around until it looks the way you'd like.
Now put this in the fridge for at least an hour so it can harden.
Once it is ready, take it out of the fridge. Now I normally use a knife to help break the chocolate apart. You can do this how you want, but a knife works really well.
Now that it is all broken to pieces, enjoy!