Great idea for traveling or road trips. Get a big map of the US, and take a picture when you visit a new state. Cut the picture out in the shape of the state, and glue to the map! I'm definitely doing this!
I love Modge Podge and the look of decoupage done well! What a great idea for an engagement/wedding gift! Get a wooden letter paint it black use Modge Podge to glue the pictures then finish up with another layer of Modge Podge!