Shiny, reflective and fun, anything holographic is cool as far as we're concerned! Clothing, bags, shoes, even nail polish ... holographic effects are so eye catching. So it makes sense that Holographic Slime has to be awesome too, right?! This easy Holographic Slime recipe uses nontoxic Clear Gel Tacky Glue and holographic nail pigment to create a super shiny slime that's as fun to look at as it is to make.