My wonderful and helpful hubby took a pallet apart and nailed them all together using a slab of wood. Here's what that looks like:
My tip is to screw in heavy duty picture wire into the back of the board:
Then I stained the wood using a dark walnut stain:
After staining the wood: (staining is a very messy and sticky job, be sure to wear gloves)
Helpful hint: draw your design on a large piece of cardboard, cut it out and trace it on the pallet wood.
I drew the seahorse on using a chalk pen (if you mess up you can wipe off)
I used a high hiding white paint. It took two coats.
Here's a few others I've done: