We had a sort of assembly line going with the various toppings. We had Nutella and peanut butter, both melted to make them a little runnier; M&Ms; mini chocolate chips; and crushed Hershey's Symphony Bar (it's a chocolate almond toffee bar; I wanted a Heath Bar but found this instead. It might be my new favorite chocolate).
We found that the caramel didn't get quite as sticky as was necessary for keeping the candies in place, so we all had to put on Nutella or peanut butter if we wanted extra toppings, but that wasn't a bad thing :)
Mine was a combination of everything, and it was delicious. It was so sweet I had to have a friend eat part of it because I couldn't finish it.
They were so easy to make, even in the dorm, and they were really fun, also! They are a great idea to make with limited resources, and they are a great way to get friends or family together, too!