The Sing a Ma Jig Blue with Yellow Shirt sings "When the Saints Go Marching" is a musical toy from Mattel's Fisher Price brand, released in 2010. This interactive toy is part of the Sing-A-Ma-Jigs character family and is recommended for children ages 3 and up. Made in China, this singing toy features a blue creature with a yellow shirt that engages children in interactive songs, promoting creativity and musical enjoyment. Perfect for young children who love to sing and play, this toy is sure to be a hit with its adorable design and catchy tunes.