Glue up pallet wood boards of even/uniform thickness to achieve a surface area larger than 8" x 12" (trim later). Alternatively, you can use plywood instead & skip the glue-up.
Sand surfaces to your desired finish.
Trim to final size of 8" x 12"
Estimated time: 5 minutes
Clamp wood on your X-Carve waste board, set up the Easel files, etc. and "let 'er rip." Go get a cup of coffee and come back in a few minutes.
Estimated time: 40 minutes
Clean up any "fuzzies," blow off sawdust and paint as desired. Finish sand and clear coat.
Estimated time: 30 minutes
glue some border strips around edges, and add some sort of picture hanging hardware on back - you're then good to go. Add this piece to your craft show inventory or hang it on your wall (in season).