Voila! In about ten minutes, I'd made a personalized coloring page. Try it out and let me know what your kids think!
Step 17: Put everything into one image
I assembled all of my images into a single composite image by simply clicking on the layers I wanted in the Layers palette and then dragging them into the window containing my background beach image. This left me with a single image containing three layers: beach, treasure chest and child.
I then used Edit --> Free Transform to change the sizes and positions of each individual element.