Our Mechanical Music Box 3-D Puzzle is a DIY replica of a vintage Orrery mechanical model of the solar system, illustrating the planets and moons' relative positions and motions. The planets are made of colorful decorative spheres and circle the sun while the music box plays the tune “Starry Night”. Assembled size: 5.5” x 5.5” x 6.25”. Pieces: 101 pcs. Recommended Ages: 14 and up.