There's a monster truck here:
http://kardsandklay.blogspot.com/201...f-another.html
Also, check this blog regularly. She lists all the freebies each day:
http://freedigitalstamps.blogspot.com/
For Thomas the Tank Engine, you probably won't find any free ones, since it's a licensed product, but you might be able to find some coloring pages if you Google "Thomas the Tank Engine coloring pages."
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Avatar is my childhood kitty, Berries.