I’ve never read Haroun and the Sea of Stories, but I really loved the quote from it that they used for this “treehouse”. I think the sentiment is one of the most beautiful I’ve heard in a while.
“He looked into the water and saw that it was made up of a thousand thousand thousand and one different currents, each one a different colour, weaving in and out of one another like a liquid tapestry of breathtaking complexity; and Iff explained that these were Streams of Story, that each coloured strand represented and contained a single tale.” -Salman Rushdie, 1991

Oh my goodness. What a beautiful quote!