My girls are 9 and 7 years old. They utterly believed an elf was delivering the letters and often wrote a Christmas card back. My girls would find the letters from Elfie on the Christmas tree each morning and my youngest daughter would leave the response to Elfie there of a night. She then started leaving cards for him in a trail to her bedroom. She was desperately hoping to see him. I didn’t do advent calendars this year so would leave little gifts inside the envelopes. These included fancy ribbons, Christmas decorated sweets, decorative pens etc. The girls are of an age that they could read the letters themselves so they would read to me all the news Elfie had to share. I also discovered my youngest had informed the school deputy head at great length about Elfie and how she was writing to her and her sister everyday! It has been a wonderful shared activity. The girls would look for the letters each morning and be excited to read about Elfie’s news and see the gifts she’d left them. They would take it in turns to read the letters and generated a lovely buzz of excitement as it led up to Christmas.Many thanks!