This jives with what I remember being told as a child on a Nickelodeon Studios tour in the early 90s: “It’s mostly green applesauce.” It’s one of those random bits of trivia I’ve told people all my life, but never had a reliable source to back it up. Thanks!

I had the same question. In “Settings” you should see “Go to New Site” at the bottom. Click that. You can also go back using the same process, except it will say “Go to Classic Site”.