I remember writing to Father Christmas when I was little, and how magical it was to get a letter back. These days, Father Christmas requires a stamp in order to send a reply, but the procedure is the same.
Luckily Harry is still easily pleased. He has drawn what he would like from Father Christmas this year - a pink train. He has also managed an 'H' for Harry. I added in the crucial address details before we put it in the envelope!
I really hope that Father Christmas has the time to write back! If you need them, here are the details for writing to Father Christmas for children in the UK.