Here's my list:
I do a few 'Tinkerbelle' gifts. I go to Dollar Tree and get packs of the glow bracelets, I always get plenty for other kids if their parents say it is OK. You'd be surprised how happy parents are when you whip out a pack of glow bracelets and the parade souvenier cart is about to come by! Michaels also has them, I think they are 15 for a buck. They also have a glow wand that my DD loved for Spectromagic at Dollar Tree.
Everyting else... I get stuff we can use on vacation and again at home. I get pj's and flip flops on clearance at
Disney store earlier in the year. A month ago I found a Little Mermaid dress and t-shirt for next trip, then she will still fit in it summer 2010. You still might be able to get a Disney store swimsuit on clearance. I also get a few new t-shirts on clearance with Tink or Minnie to wear into the park or to character meals. You can even buy a pack of Disney theme underpants at Target and surprise him to use vacation! I think I saw Cars themed a few weeks ago. LOL I have also found Disney themed pocket-sized fans on clearance at Disney store.
Last trip I found Tinkerbelle ponchos at Publix to put away for next trip as a Tinkerbelle gift, of course my DD found it!
I get a new Disney coloring book at Dollar Tree for our carry-on bag.
My Mom gives her a new Disney DVD for the flight.
Does your son wear
Crocs? Surpise him with some Disney jibbitz. I also keep my eye out for Disney barrettes for DD.
For girls- DD brings Bitty Baby everywhere, I might buy her a Disney themed outfit on eBay. For our cruise she got a sailing themed outfit.
Targer dollar area sometimes have ziploc type bags that are Disney themed. I brought some to put snacks in. Sometimes they also have Disney socks.
Another thing I am going to do... get a personalized pillowcase from Disney store online. Then I will bring fabric markers to the character meals so she can get it signed. (in the past we did this with a plain pillowcase and DD loves it!)