My kids usually end up with about $200.00, through the change bank, and chores. That is not only for stuff, though. They have to use their $$, for extra snacks, arcade games, hair wrapping etc.
My older one got into pins last trip, and I did buy her the starter kit, and 1 pin from each park. Now both are excited about pins, and I'm freaking out to see how much that will cost me. I have bought 50 pins on E-bay, for them to trade, and they will get some of those from the Easter bunny. They have also paid me for some of them, from their Disney fund. I'm trying to get a lanyard, for my 6 Y.O., and pin cases for them both.
My mom, MIL, aunts, and cousins also each slide them some cash before we go, so most of the time, they have more $$ than DH, and I.
I usually only buy 1 or 2 things. I collect snowglobes, and I always get a photo album.
DH always gets a t-shirt or two, and a hat.