Coloring Pages for New Curriculum

Here's the first couple finished coloring pages for a new curriculum that I am contributing toward. Can you spot the difference in versions one and two of Lesson One's coloring page?

Artist Notes - First hand sketched with 2B Kimberly pencils, then overlaid on my light table for inking. For the inking I used Faber Castell pitt artist pen Medium. Afterward, I scanned the inked sketch into the computer where I imported it into CorelDraw for tracing and final clean-up. Then I exported them as PNG files to be used in the new curriculum.

Turtle - Sketch Book Pro

Here's a turtle I made on my Xoom Tablet with Sketchbook Mobile Pro.