Is Heaven in the Sky?

Caleb thinks very deeply. It's starting to hurt my brain. Today's conversation consisted of questions like "How does Heavenly Father see everyone at the same time, even the people in Dallas and Lubbock and Frisco and Kade's old house?" And, "How does Heavenly Father hear us even when we're inside our house?" "Did Heavenly Father make those trees and signs? Did He build our house?" "Did Heavenly Father ever die?" And of course the usual "Where does Heavenly Father live?" Now I may know the answers to some of those questions, but trying to explain to a 4-year-old is challenging!