I was wondering about little craft items - like those teeny little packages of sequins you get at A.C. Moore ... all girls that I know at all ages love sequins! If you threw in some school glue, they could decorate some of their belongings. My girls glue sequins on EVERYTHING...little boxes for jewelry, little cards they make for each other, their dolls' clothes...

I also think the old polly pocket toys are so good - you can buy a 4 inch polly pocket "house" that opens up to a teeny travel-sized doll house with little people to play. My kids love these on trips, because they're so small and discrete, too. I've bought them in lots on eBay, and usually only spend a few dollars per little box. (ETA - I just did an ebay search - you have to write "vintage polly pockets" and they are going for slightly more than I paid 2 years ago...)

All sorts of hair ties, ribbons, beads...

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"The errors of faith are better than the best thoughts of unbelief." - Thomas Russell