Step 1: Sourcing Original Images
Step 2: Gather Your Paint and Make Some Water
Next step was to paint all of the blocks of blue and green that would be the water. No need to mark it out, I just used a free-form method in shapes that I liked.
This is the step which I could involve my three year old in since exactness wasn't important and mistakes are easy to cover.
I marked out the area where the house and island were going to be so that I didn't have to worry about painting over the green and having it effect the final look of the house.
I used eggshell interior wall paint for the water and latex craft paints for all of the fish and other details. A quart of each water color is plenty.