Congrats to you! I thing that papaflamingo
has some good suggestions for shore excursions...I have heard people using walkie-talkies to communicate with family. you can get fairly inexpensive ones at walmart or similar store...good idea to get ones with Family Radio Service (FRS) channels "family no-licensed required"...Dress code - for 7 day it's usually 2 formal nights with remaining days dressy casual...check out http://www.cruisecritic.com
it is packed with info...as well as reviews etc...ship and destination specific -
Don't know specifically about kids stuff but might find more info there as well...