Wow!
First, let me say that your drawings of Mo, Petrie, Chomper and Littlefoot came out absolutely amazing. Exceptional work, Threehorn, especially for pencil only!
I do find that Cera's face seems a little bit disproportionate, though I am having trouble deciding exactly How... Maybe it's just the expression on her face that makes her face look a tiny bit strange, because the drawing is very accurate. Cera seems to have a big upper-lip in this picture, but maybe that's just me.
Ducky, on the right-hand side of the picture, came out very well, too! I like how the characters interact with the letters in the title; very nice.