As for building instructions its pretty straight forward. I Printed the body, tail and lid on my Prusa MK3 all with supports and the flame with my Anycubic Photon but any transparent FDM filament should work as well.
For assembly I glued the tail to the body using epoxy, as with the flame parts but I made sure the pieces cured on the body to make sure it fit then assuming you want to paint him I suggest gluing the flame to the body afterward.
The light puck I used could be unscrewed very easily then just bent the infrared reciever upward so that it would fit evenly and recieve better reception through the filament. From there I just had it rest in the hole inside.