Pen/PermanentMarkerMonster

First you need to print the monster.You can download the file from Thingiverse

https://www.thingiverse.com/thing:3812070 for free and start printing!

You can use an sharp knife and sandpaper to make everything clean.

Here for I used spray paint to get it done very fast.After drying I used acrylic colors for the mouth.

Put everything in.

Done!