Begin by cutting the craft board with an Exacto knife to about 3 x 6 inch, or whatever size you want. Then get some plain card stock and cut 2 pieces the same size as the board. With the knife, cut out a heart, about 2x 2, in the center of one piece, laid it on top of the board and marked the heart, then cut it out of the board. Get a piece of clear plastic, like from a sheet protector, and cut a piece big enough to cover the cut-out with enough border for glue. Now it is ready for the kids. You should have a piece of card stock, plain; one piece of card stock with a cut-out; one piece of clear plastic; and one piece of board with a cut- out for each child. Let the kids decorate the 2 pieces of card stock with crayons, markers, stickers, lace, ribbon - whatever you have. When they are done, glue the plastic to the wrong side of the card stock with the cut-out, then glue the 2 cut-out pieces together, lining up the cut-outs. Put a small handful of metallic confetti - this one had multi-colored hearts - or anything else you might think of in the “window”. Glue the back piece on to seal it in, and trim the edges if needed.