Sankyo 18 Note Wind up Music Box Musical Movement with Winding Key - Plays "Dance Ballerina Dance" Sankyo brand mechanical Wind Up music boxes ship from USA owned and based seller. Music boxes can be used as they are or glued to your own craft or wood creations. Music box plays 2 minutes on one winding. Perfect for use in DIY crafts, hobbies, gifts and novelties. Mechanical movement and key only with no shell so you can see the movement play.