Here is some information about the Kids Crew directly from NCL: NCL Kids Crew. It includes sample activities for each of the age groups. Note that your 11-year-old will be in a different group than the others.
We'll be on a different NCL ship next month, yet I'd be happy to pick up some of the kids club programs for both age groups to give you a better idea of what might actually be offered.
We were on the Sun in 2003 (my son was only three) and he really liked it. The staff was great. They had a pizza making party and 'designed' t-shirts with markers as a souvenir. Going later this year on the Dream and he is looking forward to it.
Celebrity Infinity - Nov 2002 Norwegian Sky - Sept 2003
We are thinking of the Dream in Mar/07. My sons are 12 and 3. birthdaygirl, could you post some information on what they thought of the programs? 7 cruises and we have FINALLY built up the courage to take kids!! I've read all of the info, but would like another kids opinion.