The new McDonaldland shake, depending on which size you order, runs between 510-900 calories. Here's what it tastes like.

McDonald's has a new adult Happy Meal that fans will love. McDonaldland deal features nostalgic treat. What does the volcano shake taste like?

Now, McDonald's has introduced the McDonaldland Meal, which goes straight after that market of adults who have a nostalgic feeling for the Golden Arches. And it comes with a shake in neon colors like you've never seen before.