My wife and I collect movie theater tickets, plane tickets, notes we left for each other over time, etc. and we store them in an envelope. I thought what better way to store them then make a memory box in a shape of an envelope so they can be displayed and seen?
Yea, this design is actually expandable and able to add extra layers for any sized slot thickness. I was just doing a smaller sized one to show it off. I might make a bigger one with the extra pieces down the line once I fill this one up.