how far are you flying? i see you are in Ct which would mean your flight is not much longer than ours (from long island)... we have never had much trouble keeping the kids occupied for the two hours, especially if we are seated by a window so they can look out during takeoff and landing... depending on their ages, gameboys, coloring books, a snack or meal (brought with you most likely), video now, cd player (with headphones for all the electronics!), books to read, travel games such as guess who, checkers, cards, etc... even ispy, 20 questions, tic tac toe, etc work well... i always find that i bring far more than they really need, but i prefer to be overplanned than under! LOL!
the first time dd flew she was 4.5yo... her fave thing was to string fruit loops and cheerios on shoestring licorice and make necklaces for the flight attendants (a snack and a craft all in one!) they all wore them and thanked dd over the loudspeaker... it was fun and really kept her busy!