The basic and cheap 3D pen. How to use the pen and draw How to repair 3D pen: https://youtu.be/DbYqxmu7vhA Compare tools for 3D pen : https://youtu.be/vXDqm5EtRbo Make with 3D printer: https://www.youtube.com/playlist?list=PLtmhShv-_MyKYnRZDI32zhqu2w5qU8ilK #Eunny #3dpen