In this activity, learners discover that some things only stand up while they are spinning. To explore this phenomenon, learners build tops from household items such as CD's, paper plates, cups, and craft sticks. Learners will discover that the weight and radius of each top plays a role in the amount of momentum it has to spin. The launcher is also used to demonstrate one of the simple machines of physics: the wheel. Basic tools (e.g. drill) and plaster are required.