Calculus project ideas?

Right now i am in honors precalc in high school and, so far in the topic of calculus, we have learned how to differentiate, differentials, curve sketching, optimization, newton's method. For this project, we need to show some kind of presentation on calculus. It could be related to anything, but must involve using what we learned. Past projects have included things like the trajectory of shooting basketballs. I am stuck right now as to what topic to choose. help me please!