Science
Forces: mass, acceleration, inertiam momentum, impulse, kinetic energy
The physics of flight: rotation, torque, angular momentum, lift, thrust, drag
Additive manufacturing
How does a quadcopter / hexcopter work?
What are the essentials for flight? How can you use youyr understanding of these concepts to design a better product?
How does a 3D Printer work? What types of additive manufacture exist and how can you use them?