A tertulia is like a big playdate for grown-ups. People come together in a cozy space to talk about things they love, like books, art, or music. They sit in a circle and take turns sharing their thoughts and opinions. It's very important to be respectful and kind to every person in the group. The grown-ups also usually have some yummy snacks and drinks to enjoy while they chat. It's a great way to make new friends and learn new things.