Plan out the photos you would like to use. Each board holds 24 photos (sized 4" square) in a 4 x 6 grid.

Print out your images in 4x4" squares. Cut them out using the scissors. Lay them out on the foam core boards.

Pick up each photo, apply a layer of Mod Podge to the board, and smooth down the photo. Rolling out with a brayer is preferable. Repeat until all the photos are applied to the board. Let dry for 15 - 20 minutes.

Apply a top coat over all the photos and the board using Mod Podge. Let dry and then apply a second coat.

Let dry overnight before hanging with Command Strips (or the method of your choice).