This mini metal music box is a great classic toy. Kids hand-spin the lever to wind it up. The see through plastic cover allows you to watch the metal wheel with bumps spin and hit the little keys that make music. You can watch the mechanics as the music plays! This is a great calm-down toy that can be used for focus, stress relief and self regulation tools for therapists and teachers. 2.4" x 2" x 1.25". Mary Had a Little Lamb, Twinkle Twinkle Little Star, Itsy Bitsy Spider, and Old McDonald had a Farm. Red Based has Row, Row, Row Your Boat, Happy Birthday to You, When You Wish Upon a Star, Brahms Lullaby & Twinkle, Twinkle, Little Star.