Blue in Korokoro Musical Roller This toy provides fun activities such as finger play, looking in the mirror, and playing the music box. Turning the lever plays the "Mickey Mouse March" music box tune. It encourages babies' interest and rolls around, promoting crawling. No batteries required. Functionality has been confirmed ( ¨̮ ) This item has been used by a child, so there are signs of wear such as scratches and minor imperfections. It was very helpful in improving crawling ( ¨̮ )