Most kid's programs only go until 17 years old on cruises. If you're concerned about where they're going to be (or just want to keep them occupied) you could always schedule guided excursions for the different ports you go to. But to be honest, even if they were available to be be entered in a teen program, most kids only go the first night to meet people and never go back, usually just hang around with the people they met.
Mike (or Michael if you want)
August '98-Sovereign of the Seas
Hopefully Costa Fortuna-12/16/07 to Caribbean
Transatlantic on the QM2-summer '08
I agree with Mike. Also, on my last cruise, my brother was 18 and I was 17.. We both hungout together the whole time, even in the Teen Club. It's not really a problem, especially because we spent less than 1% of the time in there anyway...
when you get around that age. most teens dont go to the teen clubs and it ends up being just 15 year olds. sometimes 16 year olds. so yeaa they'll probably have a better chance meeting people around the ship. but it doesnt hurt to go, cuz there might be people there they're age.