# Cool Curves to rotate about axis

I am working on a project for my Calculus class in which I have to rotate a curve about some axis and 3-d print a model of the curve (using any type of cross-sectional areas). At first, I tried to model a colosseum using the curve $$y=0.5x^2$$, but I was wondering if anyone had any other cool ideas.

Thanks!

The topologist's sine curve $$y = \sin(1/x)$$ or its continuous friend $$y = x\sin(1/x)$$ (for $$0 \le x \le 1/pi$$, say) should be fun. You'll have to do a bit of design work to deal with the discontinuity of $$\sin(1/x)$$ at $$x = 0$$.