Last night’s Mad Men premiere is certainly not something we’d watch with the kiddos (if you haven’t seen it yet, we won’t spoil any details), but it did inspire us to try out this extremely cool, retro manicure. We love that this water marble nail art, although a bit involved, encourages kids to use their imaginations (and all their favorite lacquers!). Plus, in the end, the beautiful designs they’ll wear on their fingertips for weeks to come are well worth the effort. So, this mini mani Monday, gather their hues of choice, a glass of water, some toothpicks and scotch tape, and check out the video below for the full, psychedelic tutorial.