I'd love to re-learn how to write shorthand. :-) It's would be a way to send almost-secret messages, since no one can read it nowadays. Texting got nothing on shorthand! I loved writing shorthand, forgotten everything I knew.
Baby Shower Activity: When guests walk in the door, give them a numbered envelope Have each guest write down a note for that child for that month so parents can open each envelope at each month and read the loving notes to each other/their child.
"Stones and Rocks DIY Wedding guest book". Guests write messages to bride and groom on rocks with Sharpie instead of signing traditional guest book. This would be cool to put in giant glass vases on either side of the fireplace once the wedding was over.
19 Insanely Clever Things You'll Wish You Did at Your Wedding