Chalkboards are extremely trendy right now! To give your guests something sweet to read, display a relationship timeline chalkboard. If you want to make your own chalkboard, you can purchase chalkboard paint at a majority of craft stores.
If you are inviting kids. I like these ideas: -A kid drink for the toast (like cookies and milk) -Activity sheets/placemats/crayons -Legos/playdoh -Hire "babysitter" like a 13 yr old cousin -Kids open candy/snack bar