Multipurpose Tangent Solver

This project requires 3D printing and laser cutting (we also used 3D milling, but one can use only laser cutting). By some additional hardware (ball bearings, o-rings, screw) we obtain some components can be assembled in different ways in order to make significative activities concerning a geometrical approach to Calculus. Specifically one can "touch" and "guide" the tangent to a curve, make geometrical derivatives and anti-derivatives, and also solve differential equations (solve slope fields) to trace exponential curves and parabolas.