I have been blessed with the chance to lead free art lessons at events held by the Rocky Mountain Dinosaur Resource Center. And now I can share some of the lessons I started making.
These are mainly for the little artists in your family, but feel free to try one yourself, if you want.
Here are Brontosaurus, Velociraptor, and Stegosaurus. Entirely free. No copyright. Just print and follow the directions. Make copies if you want.