The Barbie Cool Sitter Babysitting Quadruplets set, featuring the character Nikki, is a vintage Barbie product from Mattel. Aimed at a wide range of age levels from 4 to 17 years and up, this set includes four African-American babies and the one teen Skipper doll as part of the Barbie character family. With a nostalgic charm and classic design, this Barbie set is sure to delight collectors and fans of the iconic brand.