Blimey, I went for years without doing a tri shutter card, and now I've done two in the space of two weeks!!
I changed the photos from black and white, sepia and full colour to all sepia so they matched, and mounted them onto pearlescent brown card. Both photograph and mount were cut using a spellbinders die. I used a gold embossed card to provide the background mats, and cut the happy birthday greeting from the same brown card. I added some stick on "nail heads" in gold, and some flowers and butterflies from my stash.
Finally, in my campaign to use up my peel offs, I edged the gold mats with flexible bobble peel offs, added some corners to the plain parts of the base card, and used the numbers to make up the age.
Best thing? It fitted (just) into a standard 5 x 7 card, but bearing in mind the flowers stood out, I made a 1/2 inch envelobox for it.