3doodler 3D Printing Pen

I have seen few other 3d printing pens, but this one is the best, it is designed in us and ships anywhere in the world.

they have a nice product market fit range from starter pen to pro to schools and teacher kits, it is just fab...

it provides various modes of operating speeds, just to enhance doodling experience, it's extruder is mess free and site claims that it is safe for children from 14 years of age