One way you can make sure you kid NEVER forgets his/her 8th birthday: hire a scary clown to stalk the tyke for the week or so before the party, then come join the fun on The Big Day.
Professor Chumley and Ses Carny would love to help make your kids wish they had never been born. All in good fun, of course.
They seriously say that the "stalking" messages the kids get are more like clues in a scavenger hunt. But really, I think I'd be looking elsewhere for "unique" ideas for my kid. Still... to each his own.