This one...after visiting my stitchers group and getting a lot of great feedback, I decided to share my creation with the world...
This tote will easily hold a full size coloring book and 24 crayons if you follow these direction. You may even be able to include a pen or pencil for your budding artist. I hope you enjoy!
Oh, and lest you think I'm lying about my measurements due to my photo here...this way my prototype and ended up a bit too small. The subsequent bags were made slightly larger and are really 9 3/4 by 11 3/4.

Coloring Book and Crayon Tote
Designed by Melanie Fleming
Finished Measurement approximately 9 ¾ x 11 ¾
PDF Here