I had to find a sort of geeky theme for my husband's friend's birthday cupcakes, so I came up with these. They turned out great!
I used a white boxed cake for the cupcakes and cut the tops off after baking so they'd be flat on top. I added a layer of yellow buttercream icing and black fondant on top. For the decorations I used colored gum paste. When the decorations were dry I used clear vanilla applied with a paint brush to stick them to the cupcakes.
The whole process was quite time consuming but not too difficult.