The age of constant questions

Madeleine has entered the age of constant questions. Right now she only has one question: "Where did ____ come from?"

This is my day:
Where did the cup come from?
Where did my belt come from?
Where did my baby doll come from?
Where did the lady come from?
Where did the egg come from?
Where did the ball come from?
Where did my shoe come from?

This is my day, explaining where everything comes from. At first I thought it was cute, and I would try and explain where things actually come from. But now it is so constant that I just usually tell her that it came from the store. After the thirtieth question in one day, a one minute explanation of an objects origins is a little bit too long. I am just dreading the day when her repertoire of questions expands. Then I really will be answering questions all day.