The product is a 2003 Mattel Barbie Krissy doll from the Pink Palace Musical Castle set. This 6-inch baby doll is designed in the theme of music and comes without packaging. The doll is recommended for ages 3 and up, making it suitable for young children who enjoy playing with Barbie dolls. Although it does not come with a key replacement, the Barbie Krissy doll is an original piece from the Mattel brand, providing a fun and nostalgic toy for collectors or children who love Barbie dolls.