Celadon is kind of like a special type of pottery that has a light greenish-gray color. It's really pretty because the color is very soft and calming to look at. It's made by firing clay with a special glaze made of ingredients like ash and rocks. This glaze gives the pottery its unique color and also makes it really shiny and smooth to the touch. Celadon pottery has been around for a really long time, and people have been making it in different parts of the world for thousands of years!