Nail fiends, consider your game elevated. Newly imported from the U.K., Ciaté’s caviar manicure kit ($25 at Sephora, 1500 Broadway, nr. 43rd St.; 212-944-6789), which comes in black, white, and the rainbow-sprinkle variety pictured here, makes 2-D nail art look, well, flat. Follow the multistep instructions to apply your own, or take the kit to Jin Soon Natural Hand and Foot Spa, where manicurists are already experts in the application (from $33; 421 E. 73rd St., nr. First Ave.; 212-249-9144).