My nephew asked me to make a PlayStation 3 Cake Design for his 15th birthday. I used a large rectangle cake pan and make two layers. I froze the layers so it would be easier to carve them. Stack the two layers with frosting between. Carve the cake to the shape of a PS3. I had the actual PS3 in front of me at the time.
Cover entire cake with buttercream frosting and put in fridge for at least an hour. Cover entire cake with one thin layer of black fondant. I used silver dusting powder for the silver areas, but if I had to make it again, I would use grey fondant instead. The silver dust got everywhere. I used white royal icing for the letters.
For the controller, use marshmallow cereal treats and mold into shape. Cover with white fondant. Use black fondant to make the buttons on the controller.