Guess what I just did.
I just finished warpping 25 Christmas gifts. Actually, they're advent calendar type gifts. Instead of the usual 25 pieces of candy, I bought 25 books at garage sales. So each night, the grandkids get to open a present, and mom and dad can read a book to them. I saw this idea on the internet and have been wanting to do it for a couple of years. I just happened to come across a couple of garage sales this past weekend that had TONS of children books, in good condition. This works out well, as my DIL doesn't like the grands to have too much candy.