I know I would get absolutely sleighed slayed (sorry couldn't resist it!) for this on AIBU but I assume I am among kindred spirits here.
Many years ago I made an Advent chest of drawers for DD and always filled it with sweets and little novelties. As she got older I tried to vary it a bit. For example, one year I hunted down Christmas themed jokes and each day had a joke and a chocolate. Another year I did the same but with Christmas themed puzzles/trivia.
Anyway, we did this every year until last year which was her first year at Uni. When I tentatively inquired if she wanted me to bring the Advent chest of drawers over on a visit I got an emphatic No. 
However, last weekend, she was at home for a visit and when I mentioned it in passing she admitted she would quite like it this year and last year it was just that she was conscious of her new Uni mates laughing at her, but this year she is sharing with friends she gets on well with and she is sure they won't make fun and actually yes, she would really like it.
I was quietly thrilled and am now trying to think of treats suitable for a 20 year old. So far DH has suggested maybe some liqueur chocolates - especially if we can get vodka-flavoured 
. I also wondered about lip balms, tea lights and maybe face masks.
I would appreciate anyone else's brainwaves.
(I would promise to supply the jokes in return but am not sure if I can lay my hands on them as they might all be on the old PC)