Amazon has this cool 3D Printing Pen [amazon.com]
on sale at $24.49 with promotion code C8BVE5X5
About the 3D printing pen
The 3D drawing pen with LCD temperature display for model printing, art design, DIY and crafts drawing. Compatible with 1.75mm ABS and PLA filament.
Creates fantastic 3D art straight out of your imagination. This pen replaces ink with ABS or PLA filaments which melt at a high temperature to create a 3D object instead of sketch on paper.
A great tool for anyone interested in 3D modelling. Perfect for children above 8 yrs old and adult no matter you are artists, hobbyist or creative lovers.