There are so many things that we can do to reduce our use of paper and I am a big fan of both electronic invitations and cards.
Recently I checked out http://www.ennouncementcards.com/ and they have a broad selection of free e-cards that you can customize with your own photos etc. In looking through their list they have a category for events/kids performances. What a fantastic idea! I like the personalized spin on this, versus just sending a generic email to invite grandparents etc. to KC’s dance recital.