The perfect dress up set for the music loving child that enjoys dancing is the Musical Waltz Dress Featuring the Blue Danube Music by Acting Out. Featuring the world's most popular waltz - The Blue Danube, composed by Johann Strauss, Jr. this dress is sure to please all ""princess"" girls. Musical Waltz Dress Featuring the Blue Danube Music by Acting Out was created with yards and yards of soft tulle, it’s not only stunning, it's soft and comfortable. One size fits most three to six year olds. Velcro back closure allows for maximum size versatility and easy dressing. Includes three AAA batteries. Dance the night away with this magical and musical dress up set!Ages 3 and up.By Acting Out