Missionary Friends

So i think having missionary friends is the best/worst thing. it is so fun to write them and share the events going on in our lives it's just bittersweet that they're not living them with you. But i know they're out there doing the best work they can and its awesome that they're so motivated to share the gospel! A couple of their birthdays are coming up and i want to send them something awesome so i'm starting to brainstorm now! any ideas?? they'd be great to hear.