365 reasons why i love you box. Maybe adjust it for deployment
What To Put Inside Your Open When Letters
Artist creates little matchbox greeting cards with hidden messages inside (part I) - 9GAG
Confessions of a Pinterest Addict: "Open When..." Letters with great descriptions
Ideas for what you should put in some Open When envelopes
I wanna do this for my future children. … More
You can make a pop-up photo box as a handmade Valentine's Day gift using this DIY tutorial.
Open When gift idea More