What to pack for an overseas trip?

In less than 2 months the kids and I will be jetting off to Israel for my brothers wedding.

What the hell do I pack?

For me? For the kids?

Thank heavens the kids each get a full 20kg luggage allowance but still… what the hell do I take with?

The weather will still be pretty warm (end of Summer beginning of Autumn), so at least the clothes will mostly be light weight.  Im more concerned with toys/fluffy bed companions for the kids.

Also, carry on luggage for the kids.  How much stuff do they need on the plane?

I am taking the kids iPad and my iPad mini (which I am getting on the weekend).  I dont know wether to take the LeapPad.  I will also take some paper and crayons but what else?

Who has been on a long haul flight, with a 3/4 hour layover?  Help me out here.  What did you take with for your kids?