Shadow box ideas for long distance relationship anniversary present?

My boyfriend %26amp; mine%26#039;s six month anniversary is next month, %26amp; i wanna do something special.. nothing too exstravagant, just a little cute something, so i decided to make him a shadow box. but, i%26#039;m not really sure what to put in it.. i have a ticket stub and some photos but we have a long distance relationship so i don%26#039;t have many other momentos to work with. any ideas would be greatly appreciated! thanks! =]|||put in pictures from when u guys first started going out..still have flowers or suvaniers from places uv went together or what he%26#039;s gotten you? use themm...very cute ieda to use a shadow box!!