This is one I did for a couple's 40th Birthday party. They were turning 40 a month apart and were having a huge month long celebration with lots of different fun events.
I was lucky as the wife of the couple hired me and totally let me have free reign of the project.
This is what I came up with... a pocket folder invitation.
Their colors were red & black and I put together this invitation for them.
With a bright red envelope and coordinating sticker closure
One side was the invitation and the other had tiered information pages.