The Wal*Mart in our area has them at the end of the toy section nearest the bikes/camping stuff. They are with a bunch of low priced small toys and some water guns, etc. We also found a little fan there that had lights on the blades that changed/blinked while it went around...we put a couple mickey stickers on it and created a favorite for our DS.
Also, enjoyed hearing about spreading some pixie dust by passing out extras...we only took 7 or 8 for our DS but had an extra pack of the bracelets on our last night...after a late dinner (waiting for Illuminations), we broke out a glow stick for DS and decided to give the extra bracelets to the 2 little girls that were sitting by us, they looked thrilled so it certainly brigthened our day as well. I could just imagine how cheering up some 50 - 100 kids would feel.