The set includes 2 equilateral triangles, 4 right triangles, 13 squares, and the music box. The set can be used either as a stand-alone magnet tile set or in conjunction with other PicassoTiles magnetic building blocks as add-on pieces. Unlike typical toys, each piece can be replaced and always be added to build objects as big as desired. Dream Big and Build Big! Experience the captivating melodies of the Music Box Magnetic Tiles - watch them spin and rotate like a music box, igniting curiosity and wonder while transforming the building into an auditory and visual delight. DURABLE & SAFE: Each piece of magnetic tiles is manufactured by high-quality, toxic-free, BPA-free materials with the highest standards to ensure the safety of the children. PicassoTiles Music Box Magnet Tile Building Block Musical Mechanism Piano Magnetic Tiles Blocks Construction Toy Set STEM Learning Education Kit Playset Boys Girls Toddlers Gift Kids Age 3 & Up PTE20 | Picassotiles | | 20 Piece Rotating Music Box Magnetic Tile, Building Block for Kid Age 3 & Up, PTE20 | Best Buy