Final Project Ideas
Mehndi ("Henna Tattoos") is an old Indian artform, traditionally used on brides before wedding ceremonies. A paste - consisting of a plant based dye - is applied to the skin manually. The designs are usually ornate and complex, and require quite a bit of skill to apply.
(Source: www.worldsbride.com and www.beautytipsmart.com)
While there exist henna stencils (which allow you to print designs on sticky paper that can be applied to skin, then traced over manually with henna), I thought it might be interesting to build a "Mehndi Machine," a sort of CNC extrusion machine that uses mehndi as its material. Such a machine would allow you to create designs digitally that can be directly printed onto skin. This might be too complicated, but here is a doodle of the idea: