What do you get when you take the king of the dinosaurs. Put it in a time machine, travel to the year 2029 and let it merge with the T-800?? ...I think you know the answer. Terminator REX!
It is possible to put a LED inside the skull, for the glowing eyes

Initially designed for the T-REX challenge on Thingiverse. Based on the shape of the T-rex skull by Curriculum.

No 3D printer at home? Don't worry!
[ORDER HERE] [ord] in my Shapeways shop
[ord]: http://shpws.me/HSVl

-UPDATE-

(The 'Skull.STL' was not printable and is now replaced with V01.3!)
V01.31: LED input
V01.33: NO SUPPORT UNDER UPPER TEETH
V01.37: Works in Slic3r
V01.38: LED input & extra supports
V01.41: Parted Jaw and Skull (should be printable without supports)
Only the Jaw has a built-in support structure for the large overhang
V01.42: The Skull part got some improvement on the 'pipe'

I'm Sander, creator of this 3D Print. And founder of my own 3D Scan & Design service: Duplicate 3D

Do you love weddings and 3D Printing? I've opened up a Shapeways shop for 3D printed wedding accessories: [Check out the Wedding 3D shop on Shapeways] [w3d] [w3d]:https://www.shapeways.com/shops/wedding-3d

More: + [Thingiverse] [thi]
[thi]:http://www.thingiverse.com/sannyshine/designs
+ [Duplicate 3D] [d3d] [d3d]: http://www.duplicate3d.com/ + [Twitter] [twit]
[twit]: https://www.twitter.com/duplicate3d + [Shapeways] [SWd3d] [SWd3d]: https://www.shapeways.com/shops/sannyshine

A thanks for your interest!
and keep on printing