A scrunchie is a soft, stretchy hair accessory that looks like a little fabric donut. You use it to hold your hair in a ponytail or a bun. They come in different colors and designs, like floral or polka dots, so you can choose one that matches your outfit or your mood. They used to be really popular in the 1990s but now they've come back in fashion. Some people even wear them on their wrists as a cute accessory when they're not using them in their hair.