One holiday activity that I have seen online is to wrap
Storybooks and unwrap and read 1-2 a day during the holiday season.
Here is a recent post of some Christmas storybooks.
If you are looking for a source for a variety of books, check out your public library. Checking out books from the library is a great way to get a good selection of books and save money throughout the year. By using the library you can read a variety of books without having to purchase a lot and saving on the clutter of owning a lot of books. You can then purchase only the ones that your kids really enjoy.
If you keep a list of the books that you want to purchase, you can keep your eyes open for them at thrift stores and garage sales to save even more.