The Katie Chronicles, CSI (Christmas Scene Investigation) Edition

A few years ago, we got Katie a play kitchen set for Christmas. We were in Florida for the holiday and it was too big to haul down there, so we had to stage a whole scene where it was set up in the house for Katie to find when she returned, with a note from Santa explaining why he couldn't bring it to Florida. Fast forward to a recent morning at the breakfast table.  We were talking about the elves and Santa's magical powers. Katie began talking about how Santa got her kitchen set down the chimney that one year and she remembered the note. She said, "Mommy, Santa is a miracle worker! I compared his handwriting to yours and Daddy's and it looks just like yours! He can imitate people's handwriting perfectly!" Her investigative skills are growing, apparently (darn you, Nancy Drew!). How long until she figures it all out?