At the dollar store you should be able to find a tube of different colors of lip gloss. Near the lipstick you should also be able to find some body glitter that is so popular with kids of the younger set. Jewelry is cheap there, too. Clip on earrings and a couple of bead necklaces are great.
Take a gander over to the hair bow section and pick up a couple. Add to this a hairbrush and a mirror. You can make cute curlers for a youngster with film canisters and bobby pins. They can roll their own hair or the hair of their favorite dolly. Put all of these into one of those clear plastic drawstring bags and you have a nice gift. You could also include some glitter nail polish but I would get the mom's permission first.