Catchy Birthday Invite Title 20th Birthday Invites?

20th birthday invites? - catchy birthday invite title

For my 20th Birthday, I am a 80's themed party. I am with the invitations and have the capture of 80 related trading or something that everyone will understand or remember. A form of currency. Something like "wax, beeswax, but more like a birthday perhaps. Ideas. Preferably, fun and glory?