In just a few days, December officially starts. Many are going to have an advent calendar. I know it is a bit late to order advent calendars from Etsy at this point, but you can consider buying one for next year.
This pretty woodland advent calendar comes from Peppersprouts.
Another idea, instead of stressing about buying those 24/25 small gifts, why note have a note some of the days, with stuff like "Today we're making Christmas cookies". Think activities and similar, suitable for advent. Buying all those gifts can be a bit expensive, and I think that at least some kids want to have some quality time with their parents.