Trevor is a Pleo. That is a computer controlled robot dinosaur. He's been through a few changes since we got him, since you can upgrade his firmware using an SD card. He has a couple of processors, a camera in his nose, 20 motors and over 100 gears. And he can't walk in a straight line as one of his back legs seems a bit gammy. And some of the white has come off his teeth because the paint sticks to the leaf that we got to feed him with.
But we like him anyway.
You can find a really good guide to how a Pleo works here: