I brought a few Disney souveniers with us that I bought at the Target $ spot or on sale at the disney store. I also brought our own glow sticks and necklaces.
I got her new Disney PJs at the Disney Store for about $8-$10 a pair. Very cute and I suprised her on two nights with new jammies.
You can also find T-shirts a lot cheaper at the Disney Store. I got her 1 for $5 that she wore down there.
Little notebooks at the dollar spot, stickers etc were great too to bring out at restaurants or to use while waiting in line. I found some inexpensive crazy 8/go fish cards in Disney themes at the Dollar Store.
I also brought down Disney themed fruit snacks for treats in the park.
I also got some small Crayola coloring sheets that had 5-6 markers. Those were fab on the plane/restaurants. They are about 4x6 inches and there are a lot of coloring pages in each set. They had Toy Story, Princess and Cars. I found it at AC Moore, but that was last winter. I think I've seen them at Walgreens near the greeting cards. I think regular price is $6 a pack and you can use a coupon at AC Moore. I found a link
http://www.crayolastore.com/product_...7CSEO%7CGB%7C&.
You can ask for Mickey Head stickers at the front desk of your resort for free.
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You could play I Spy while waiting in line. Do a scavenger hunt with the kids to find certain landmarks or characters.
My DD loves the Maps that you get at the entrance. I always grab a few extra to have as souveniers. She continues to look at them at home.
I'll post back if I think of other things. Have fun!