Scientists are always sorting and classifying objects based on their characteristics. In a hands-on learning activity, young space explorers work together to categorize solar system cards based on their properties. It is up to the young scientists to decide on how the cards will be sorted, whether it be size, color, distance from the sun, or composition. It is a great instructional activity in which learners can apply scientific practices, such as observing, sorting, classifying, and categorizing objects, as they travel through our solar system