Three Year Olds

I've been trying to wrack my brain around traveling 6,000+ miles in an airplane with a newly turned 3 year old. Yes, I know, many others have gone before us and they survived. Elizabeth is a really good traveler and has suddenly become more agreeable. She certainly appears to be excited about her sister and when we mention going to The Great Wall she says "like Big Bird". We have a DVD called Big Bird in China that she has watched numerous times. I am putting together a back pack with crayons, coloring books, stickers, magnetic doll house set, new magna doodle and Kai Lan Colorforms set. If anyone reading this has any other ideas don't hesitate to let me know!