Of all five of the games listed here, this is the one you need the most. Especially if you're a parent.
Google Santa Tracker does more than let you follow Santa during his travels across the world. There are a bunch of charming videos and features on top of a stack of Christmas-theme minigames to keep both you and your kids entertained.
This is more than a game, it's an app. And it's pretty much a must-have if you're on the market for some mobile Christmas entertainment. You can grab it on Google Play or give the browser-based version a try.