The 3Doodler Start 3D Printing Filament Refill Bundle includes 250 pieces of assorted color plastic filament designed for use with the 3Doodler Start+ 3D Pen. The manufacturer recommended age for this product is 6 months and up, and it comes with a 1-year manufacturer warranty. This bundle is perfect for young creators looking to explore the world of 3D printing with a low-heat, kid-safe product. The compact product dimensions of 2.8 x 0.96 x 7.01 inches make it easy to transport and store.