For my Calc class we had to do a final project of anything related to calculus. I chose to use our 3D printer to print a lure. I printed a spook lookalike, because of the simplicity of designing. If interested I'll include the math, I used to prove it would float before printed. Still awaiting the paint job, as all my school has is purple filament.
Math:
I used this function, as it mimicked the shape after revolved around the x axis- y=0.01x³ - 0.13x² + 0.51x + 0.14
Then rotated around the axis with this integration, from 0-7
π ∫((0.01x³ - 0.13x² + 0.51x + 0.14)^2)=Volume
Volume=9.92cm^3
Now calculating the density from the mass given from the printing program
Mass 7.83 grams
So the density is .789g/cm^3
The density of water is 1g/cm^3 so this lure will float, and it does.