I have always filled stockings for my grandchildren. I used to fill stockings for our adult children too, but stopped that as it was just too hard to find things to fill them that they would like.
My college-age granddaughter asked me a couple of years ago if she was still going to get a stocking, so yes I've continued to fill one for her. 
For some reason the stockings are what the kids look forward to the most. I'm even filling a stocking for her boyfriend this year. They have been together almost a year and a half now, he came with her last year at Christmas and while I did buy him a gift I didn't fill a stocking for him but decided to include him this year and hopefully he will enjoy it. I asked her for ideas on what to fill it with, so that helped.