Its my first time using blender. I holed the head with very basic methods and holed a cylinder from the bottom to the head, so you can add an LED into the head and let the eyes glow.
You should print this model in white and protect/mask the eyes while painting this model.
So the eyes which should glow stay raw white PLA.
The paint on the head should prevent the light to shine on the other surfaces.
At the end you remove the support material which also got generated inside the tube/head.
Im still in progress with this model. Printed out fine, now i will paint it.
Printed in 0.2mm resolution with support (if you enable support, keep an eye on the shoulders, at first they got generated without support! (needed to change some support values).
White PLA (because of the eyes): https://www.amazon.de/gp/product/B00NG69QF0/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
BQ 05BQFIL027 PLA Spule für Drucker, 1 kg, 1,75 mm, Reinweiß PLA
Carefully check the support (you may modify your support settings to keep the shoulders supported).