I made this plaque for my husband last year. I went through my files and found some precious pictures of my husband with our kids. I used picnik (which no longer exists) to tint them, but my favorite is now Pic monkey. It's very similar to picnik.
I cut a 1/4" thick piece of wood to 13" x 16" and painted it black (any kind of paint will do). Next, I printed and cut 14 pictures to 3"x3". Then I made an 8x10 with the quote- "Blessed is the man who fills his Arms with his Children" (I personalized it by adding Happy Father's Day and the date). I cut it to 6 1/8" x 9 1/8". I layed the pictures out before gluing them down and made light pencil marks to give myself a guide. I used Mod Podge to glue them down. Once they were dry, I thinned some Mod Podge with a little water and painted over the whole plaque, leaving a light texture (I used a wad of paper to lightly pounce over the plaque). Aaaaand, that's it! When it's finished, there's approximately (it's not perfect all the way around...and that's okay!) 1/4" around the whole outside edge.