While a tad time consuming, they were relatively simple to make. The hardest part was probably transporting them to the party. I'd like to find a better method than a Styrofoam board the next time I make them.
I used vanilla cake, chocolate frosting, green candy melts and assorted candy for the decorations. While I thought the sprinkles would be more popular with the kids, the red balls seemed to win in terms of popularity.
Bakerella has published a book with all her recipes and methods which are also posted on her blog. My favorite tip is adding Crisco or paramount crystals to the candy melts. This makes the consistency smoother and liquid longer which is important if you are making a lot of them. Let me know if you try making them!