My daughter wanted a High School Musical cake for her 5th birthday but wanted all the characters on the cake. I found a picture from the movie in one of her sticker books and wrote a note on it, then laminated it.
The rest of the cake is just a 9 x 12 cake that was frosted and then tinted red. I used a star tip to outline the yellow HSM letters, than use a white dot of frosting inside the letters to replicate the light bulbs. She loved it!