The digis were freebies from a variety of places: Digital Two for Tuesday, Sliekje digi Stamps, and *The Graphics Fairy LLC*.
In coloring the digi-stamps, since I don't have Copics, I use a variety of medium - usually chalks and/or gel pens, though I'll use other pens and paints as well from time to time. I also use my Dove blending pen. I've found that if I work quickly, I can add a spot of color with a gel pen and then use the blending pen to pull from it to create lighter shades around it. Using this technique helps shade the images. I can do a similar thing with the chalks, though often I just pick up some chalk directly with my blending pen when I'm going to use them.
The shading doesn't show up in the pictures as well as it does in person. But here are some more examples: