Meet the 3Doodler Flow 3D pen, the latest innovation from the creators of the world's first and best 3D printing pen. This 3D pen for kids and adult lets you build and draw 3D structures freehand or use stencils with heated plastic that hardens almost instantly. The 3Doodler Flow works with 1.75mm filaments like PLA, ABS, and wood, making it versatile for a wide range of projects.