Christmas gift letter idea??! 🎁

So my SO is going on a trip the day after Christmas and is gonna be gone for two weeks. I was thinking as a Christmas gift I was gonna write him a letter for each day he was gonna on the trip so he can read it and think of me. Then I thought instead of doing each individual letter in an envelope or something to maybe get a notebook or journal and to write all the letters in there and give him like little chocolates or presents along the way. But like decorate each page and then write a letter and then make the one before he comes home really long and nice! Any things that you would think to add? Any ideas?? Feel free to comment below with anything please :)