On the Jan 26th Magic there was 800 to 1100 (depending on who I talked ) Kids the ship was pretty full and from what i gather there is always lots of kids on board . I have not been on the 4 day but the 7 day has mor activitys like a charactor breakfast and other things they just don't have time for on the 3 or 4 day . Try this link tons of info
http://www.disboards.com/forumdisplay.php?forumid=9
Great people just like here on Cruisemates . Doreen