Still can't concentrate on work due to these probing questions posed by our little thinker.
Googled "are there more grains of sand in the world than stars in the sky" and my mind is now a mess.
There are between 10 sextillion to 200 sextillion (wtf?) stars in the Universe, and only between 2.5 sextillion and 10 sextillion grains of sand in the world. So stars win, that one's settled.
But then there are more atoms in a single grain of sand than there are stars in the Universe
What have you started, Jack? What have you done?
I still can't find a definitive answer on wheels vs doors, but I'm sticking with wheels.