I just realized why the MacGuffin from Scribblenauts is called "Starite". Star + Write (what you do all the time in this game).
I at one point wonder why Maxwell's Evil Twin, nicknamed Llewxam by TV Tropes and maybe another website, always steals from other people, but then I came to a conclusion, he was created by Maxwell, but Llewxam doesn't have a Notebook, therefore, he steals stuff because, well, he can't create anything, so he takes whatever's been created so that he can feel the pleasure of having something his Good Twin does!
Also note that Maxwell is constantly creating new things and giving them to people. His opposite twin does exactly the opposite action.
You can give him a "Maxwell's Notebook" and he'll make a bunch of random objects.
The sequel's title. You know how the main draw is adjectives that enhance objects? Why else would it be called Super Scribblenauts?
Similarly, Scribblenauts Unlimited is so called because there is no item limit.
Either that, or because it was a launch title for the Wii U - hence, Unlimited.