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This interactive 3D simulation allows students to work on the development of a virtual catapult, capable of launching giant paintballs. Using the Design and Test methodology, students must create their catapult so that it is capable of achieving the required tasks. These tasks include shooting a paintballs for distance, height, and strength. Students are given a budget of $1000 with which to complete the project. Once a task is chosen and a catapult is designed, the student must test their creation to see if it is capable of completing the chosen task and redesign it if required. When the student is finished they are given their results and the chance to try again.