Are either of them worth going to?
We have a full day (5pm flight) the day after our cruise and have time to kill, we have never been to Ripley's or wonderworks are they of interest to a 11 year old?
An 11 yo. will love either, especially if it's a boy. I recommend WW. It's about the same price, and will occupy more time. Also, as my 12 yo. DS say's, "At Ripley's you just walk around, and at WW you get to do stuff." Have a great trip.
WW is interactive play similar to Disney Quest. They also have Laser Tag for an additional fee, which my DH & DS are going to be doing along with WW in Dec. We're all going to the Outta Control Magic Show that night. It is in an upside down building that gets them excited about there adventure, before they ever go inside. Check it out here www.wonderworksonline.com