I might suggest - rather than use the original instruction cards on the apron, which are sometimes a little cryptic even to seasoned pinheads; or fancy schmancy colorful cards with info about the machine's programmer, artist, and production run that your average user really won't care about anyway - how about typing yourself up some instruction cards that clearly define what to shoot for and why. People might get into the game more (and spend more money) if they understand the rules behind it, and don't just see some random flashing lights.