http://www.sevenbs.com/rhodeisland.html
http://www.deepseafish.com/prices.htm
now for the money captain johns can't be beat..... kids will have a blast... regardless if the are put on jumbo scup, sea bass, or even blues...
Frances Fleet is one i wouldn't recommend for kids... Been on those boats way way too many times... it's more of a boat for the experienced fisherperson that likes a crowd... if you get what i mean...
fished the seven b's a few times for fluke... always got my limit with some prize fish to go along..
If you got 20 kids and 20 adults i'm pretty sure you could get a boat to yourself...