Our DDs should be friends! Mine likes to pull out the late night philosophical and scientific questions too - and my poor old brain has to struggle to pull out a dusty old grasp of concepts like karma and reincarnation, or whether the sun rotates
I also do a lot of late-night googling to tell her the answer next morning (yes, the sun rotates!)
Has your DD read A Wrinkle in Time? There's a nice little scene where the characters jump through time and space and accidentally stop over in a two-dimensional world
(Gosh that took the wind out of my sails a bit! )