Balloon Stegosaurus
By ExpertVillage
Balloon T-Rex
1 balloon T-Rex by Mr Fudge (Yourballoonman)
Here is another one by Michael from Balloon-Animal.com. This is a 2 balloons T-Rex.
Balloon Brontosaurus
By Malik Haddadi at eHow
How to Make Balloon Brontosaurus -- powered by eHow.com