Drill a hole in the center of your wood plaque the same width as the fitting from the clock kit.
Using a photo editing program, create a photo collage and print it out.
Trim the collage to fit the base using scissors.
Apply a layer of mod podge over the face of the wood plaque. Lay the collage on top and press to smooth.
Poke a hole through the center of the collage where the clock kit will fit through.
Attach clock kit according to package instructions.
Notes
I used a clock for my project that already had the hardware attached to the back. If you use a wood plaque, drill a hole in the center and attach a clock kit. A clock kit comes with two hands, a battery compartment and a motor. You can find them at most craft stores.