I cut the pictures down to 5x5 and the black cardstock to 5.5 x 5.5. I put a coat of mod podge directly on the tile then added the black cardstock on top.
Then I let them sit for a half hour or so and while the mod podge dried completely. Now I have a set of four cute tiles. I just need to get some little easels to display them. But I love how they turned out. Makes a great father's day gift as well. Here they are sitting pretty.