I really like Mendi, it has the fun of a tattoo but it only lasts at the most a couple weeks. Here is a very simple mendi design that one of my SIL made for me on the Eid-
When in Pakistan for my Sister-in-Laws Nikah(wedding) every woman in the family had mendi. The Bride herself had mendi that went past her elbows and also covered her feet(even the sole was covered in a checkerboard pattern. Her mendi lasted for about a month, and everyone else had mendi that only lasted a week. The type of mendi used can really affect the length of time before it wears off, with the more expensive mendi lasting for a very long time. If you ever have the opportunity, it is something really fun, and if you end up not liking it it will eventually come off!