One of the most recognizable holiday treats at McDonald's is making its return, along with one of Grimace's relatives.

McDonald’s mascots Grimace and Uncle O'Grimacey stop by the TODAY plaza to mark the return of the Shamrock Shake, with $0.25 of each shake supporting local Ronald McDonald House Charities.

The Shamrock Shake is back at McDonald’s—and so is Grimace’s Irish uncle, Uncle O’Grimacey. And yes, there’s already merchandise available. Nostalgia is an easy way to draw eyes to whatever product you’re pitching to consumers,