"Random fact. The tune that Wonka plays to open the door to the edible room was in fact the Marriage of Figaro. Mrs. Teevee claims it's Rachmaninoff. Additionally, the kids in the movie were really seeing all of that for the first time, and a lot of the room really was edible. Additionally, the 'buttercup' that Wonka eats was made of wax, tasted awful, and he immediately spat it out off camera."