Addy: What's up there?
Me:  Do you mean the light on the ceiling or are you talking about the sky?
Addy:  In the sky.
Me:  Well, there's birds and clouds and airplanes, and further up there are stars and the sun and the moon and the satellites and the space station.
Addy:  Ooh, I wanna go to the space station.  I can fly in a rocket and go visit the space station.