Glow sticks!
Mainly so I can see them at night. But that is not new to Disney, we take glow sticks anywhere we go at night; At Disney, we bring extras so we can share with kids around us.
Also, pins so we have some to trade in park, already on the lanyards.
Then we set a dollar limit per kid for spending money but they come home with so many freebies they are happy wit that and buying 1-2 things. This time, they said they are ok not buying anything, but we shall see. The girls still have the things they bought: charms, bracelets, music box, Pandora stuffies, umbrellas from china. The boys bought toys and pretty much broke them all (monorail, busses, alien saucer, slinky dog)...so I told them we should spend money on treats instead and they can get whatever they want (which is a huge thing for me as a crunchy mama).
I DID buy a $20 bubble wand for my 2 year old last time because I was sitting for 1.5 hours waiting for a fireworks show...that was one of 2 items he got lol.