Challenge:
Create your own version of a paper propeller that stays in the air the longest.
Steps:
- Change one factor — blade length, width, or angle.
- Drop it three times and record how long it spins.
- Compare results with your classmates.
- Present your best design and explain why it performed well.
STEM Link:
This activity connects aerodynamics, physics, and engineering design — all essential for building real drones.