We don't do fantasy about who brings it - I just pull it from under the tree when we have lit the Christmas Candle after dinner. Ours is just a "settle down to bed in the evening" type - not one with loads of activities like I know others do.
We have new PJs for all 3 of us (DH, DD and I) - sometimes new bedsocks or slipper socks for up to the 3 of us as well. I am considering a new hot water bottle with a festive cover for DD (funnily enough, having just watched the JL ad, her old one is a penguin cover but the rubber is starting to perish so a new inner is needed).
There is also a Lush Santa bath bomb for DD and usually a lovely relaxing Lush bath bomb for me. Sometimes I get DH a nice shower gel (chocolate one year was hated, but black pepper and chilli was loved another!).
There is a naice hot chocolate for everyone. I try to get the "lump of chocolate stuck on a wooden spoon, perhaps with added flavours" type. This year, they are all plain, except DD is having milk choc and DH and I are having dark. DH quite likes a chilli one sometimes, I like one with a dropper of amaretto in it, DD has had ones with smarties before for fun. But she prefers to have marshmallows on the top, so I just have a bag of those in too now (I found some snowman shaped mallows in IKEA recently that are put away).
The last 2 things in the box are DD's stocking and our family copy of "Twas the night before Christmas" - the original. We have always read that to DD going to bed on Christmas Eve since she was 363 days old (she was born on Boxing Day morning!). We have a Mr Men and a Moshi Monsters version in our bundle of Christmas books, but the original is saved for Christmas Eve.
The idea is that when the hamper appears, it is time to put out Santa's milk and cookies (freshly baked that afternoon as the oven is always on then - I keep a log of dough in the freezer to slice and bake in case we don't have the inclination to start from scratch!), Rudolph's carrot and DD's stocking - then head upstairs for her bath, new PJs, come back down just for her own cookie and hot milk and a last check on the Norad website, before the story in bed (and possibly a few more). But it does make a break for her to move to bedtime, which is helpful for us, rather than rowing about staying up a little longer and then another little bit......