What is matter – anything that has mass and takes up space. Everything all around us is made of matter. But how do we categorize different types of matter? Based on its properties – some properties are variable, like mass and shape, where they can change even though the substance remains the same. Other properties, like fluorescence, density, and magnetism, are constant properties – they are based on the substance itself. Join Discovery Guide Cynthia in the Children’s Museum of Houston’s Matter Factory exhibit as she explores several different properties of matter. Plus, make sure to stop by and take the Stuff Sorter challenge!