She's a smart one

This morning I was telling Eirena and Adisu the story about St. Nicholas. I told them how he helped a family by putting money in their stockings so the daughters in the family would have a dowry to get married. After I finished the story I explained that it was because of that story, and to help remember St. Nicholas that we hang up stockings. Eirena looked at the stockings hanging up and then asked, "so what's in our stockings?". Does nothing get by this kid?