First things first - paint your seashells with the watercolors. This is as simple as wetting the paint brush, dipping it in the various shades of watercolors and then on the seashells.
When done painting the seashells, let them dry completely in an undisturbed area.
Once those are dry enough, get the glue gun hot and ready. ADULT SUPERVISION IS REQUIRED ON THIS STEP!
Arrange and hot glue the seashells onto the wood frame. You might have to layer some on top of each other.
When done again, set aside the decorated frame to let it dry completely.
Now the final step! Fill your seashell picture frame with your favorite photo and display your hard work proudly for ALL to see!