well to be honest what you are looking for is a 3d printing pen

there are different types

* the extruder type

example the 3doodler ( which is the 1st company invent the 3d pen but now out with the latest 2.0
for this

kind you will want to get snips of filament from spools because i noticed on the owners manual they mentioned wood
filament which is not otherwise sold on the site so it should be good but with the 3doodler use 3 mm filament and follow temperature guides
and it does use a hot extruder so be careful

* the stereolithography kind which is mostly the Creo pop 3d pen but others may be potentially possible