Cannabis nail art is a fun trend to join in on. This is especially true on 4/20, a holiday that celebrates all things cannabis. If you want to try it out for yourself, there are so many fun ways to show your 420 pride. Start With The Basics Olive and June’s Gel Mani System Olive and June The simplest way to get into nail art is to start with a gel nail polish kit that includes a UV light. Gel allows for so many different techniques and designs but it does require the light to set.