Start 3D Printing Filament Refill Pack for Ages 6+ (x250 Strands, Over 1250 feet of Extruded Plastic) Get the smoothest 3D drawing and doodling experience. Bring any idea to life in 3D and take your creations to the next level! [Safe to Use] Designed to be completely safe for use by children ages 6+. 3Doodler Start plastic has undergone the strictest safety testing. [More Value for Money] Contains x50 strands of each color; Red, Blue, Green, Gray, and Black for a total of x250 strands! Each plastic strand creates 35 inches of Doodles and tons of fun! [Bonus Templates and Patterns in App] Get an interactive experience with The 3Doodler App! Packed with a dedicated, easy-to-use template section and step-by-step instructions, earn badges for completed projects and photograph & share YOUR creations directly on social media.