I always buy an Arcade 1Up cabinet for Christmas. They usually put some up for sale, so I bought the Marvel vs. Capcom table style cabinet. The Star Wars cabinet wasn't on sale but I bought it as well because they're kinda hard to find.
My kids are sneaker freaks and Finish Line had some decent deals on Black Friday. I got them all new pairs of New Balance 650s for 50 bucks.
My kiddos are all adults (oldest is 24, youngest is 20) but I still like to spoil them on Christmas. It's more for me, now, than it is for them.