In this design challenge, learners will create their own roller coaster using household objects for the track and a marble or small ball as their cart. This activity is a simple introduction to hands-on engineering with basic physics connections to gravity, velocity, and potential energy. Includes building and testing suggestions and questions, background science, and an activity video featuring roller coaster examples and an ASL interpreter. A Spanish version of the activity is also available. Activity costs could be lower by using all recycled materials.