Why not get some music-themed polishes? Here's Orly Matte FX in Iron Butterfly, CG's Techno, Unplugged, Turned Up Turquoise, Strawberry Fields, Sweet Hook, Reggae to Riches, Make Some Noise (I got those all from the drop down menu so that's why it's one link), and maybe some music nail decals? Guitars, music notes, etc. If someone goes above and beyond you could get them one MoYou stamping plate like this Rockstar plate.