I feel much better now! I plan to be prepared with plenty of our own snacks and drinks, and everyone will have their own entertainment system in case the choices for movies/tv on the plane are not so great.
no idea how the security system works in Canada but in the US you can't bring drinks through security. They will make you throw it out. Instead you have to go the the newsstand after security and spend a ridiculous amount of money for a bottle of water/soda/juice.
I am GUESSING you are flying from your home to Newark(or another US Hub) where you change planes?
I think (AM NOT SURE) that at your first US airport you go through customs and then they force you out of the secure area where you recheck your bags and then go through US security to get back into the secure area. (at least that is what appears to happen at Continental's Terminal C in Newark, NJ) So the US rules would apply. Probably best to findout from someone who knows for sure- dont take my word for it.
The US Transportation Security Administration website is found here:
http://www.tsa.gov/traveler-information.