Pre-Work to help you get started with 3D modeling (complete prior to 2/15 class):
The following videos introduce the basic skills and tools available via TinkerCad. However, you will need to do additional research in order to create the desired shape and function based on the complexity of your design.
Here are a few files that you can import into TinkerCad and then into Cura in order to give you a better understanding of the potential settings, scale and print time.