all the kids want them..........in answer to your question, this is how I handle it........I have 4 kids, three sons 13, 5 and 3 and a daughter who is 7. I usually buy the three youngest the light flashing toy soon after we arrive, then I tell them each, if they see something they like to let me know and we will pick it up right before we leave........they each get one big thing and I usually pick them up a small thing as well.
Example..........I took my daugther with me to the downtown
disney store and told her she could pick out 1 big thing.......she picked out the cutest tinkerbell costume for halloween........it is adorable and she was really good about not asking for another thing.
My boys, 5 and 3 were a different story.....they wanted everything.....but when it was all said and done, they knew just one thing to pick out.......my five year old son picked out a buzz lightyear toy and my 3 year old picked out a mickey car.
My oldest son picked out those big mickey gloves !! He said just don't tell anyone!
I did do additional shopping for Christmas for stuff they really wanted but did not expect.......like the monorail set for my five year old son, and for my daughter, this version of an american girl doll dressed up in WDW attire, with a matching tinkerbell costume that looks identical to the costume my daughter picked out.
I also bought my sons the peter pan figurines set they could play with together in the room. Overall, they did not get too crazy with souveners this trip!! Thankfully!
Michelle