This is a lovely website if you want to make the magic of Christmas a little more real for your kids. Its a free video that you personalize and it is sent to you for your child to watch. I've done this for my son since he was 3 and he was utterly enthralled and super excited that Santa knew who he was.
I've done it again for him this year, but I do suspect he is just humouring us with regards to still believing in Santa, but its fun anyway. https://www.portablenorthpole.com/en/
Hope I'm allowed to post this link, if not please let me know and I will delete.