LEGO Brachiosaurus
I Built this because I knew I needed a Sauropod in my collection. The neck is very posable and the limbs are on ball joints, like the LEGO Elves dragons.
The tail has two ball joints. The whole thing is quite heavy. I built the knees as a prototype, but I liked it so those joints stuck. I copied the idea of using a clip for a mouth from this LEGO Ideas Entry.