A ladder for the wedding
You can build very cute figures out of wire. Take a wire and wrap it in black fur or paper for the groom and wrap another one in white for the bright. The ladder is also built out of wire and you can fix rolled up bills to the rungs with Spellotape. Instead of the wire for groom and bright you could also take paper and carton.
This money gift for a wedding can be fixed in a nice frame. This way, the gift will be a great memory of the wedding, even if the bills are gone.