Are you talking about stuff you make yourself, or stuff you buy?
For store bought stuff, the 10 year old girls here love stickers, you can usually buy them in sheets of 10 or 20, they are cheap. They have a lot of different kinds of stickers, from whatever cartoon is popular to just cute things.
Also pencils and such are a HUGE hit here.
If you are looking for an activity you can do, and then the girls can take home, try something like cutting a star, about 2" wide out of say 1/4" plywood, you can stack 4 at once and cut them on your scroll saw, then sand them a bit, and drill a hole in one star point. Give the girls some colored markers, and some of that glue stuff with the glitter in it, and let them decorate the stars, put their names on the back etc. Now show them how to braid a necklace for the star, you can used various colored bits of yarn etc if you like.
Make the markers the washable kind if you are going to buy them, that way you don't have to worry (too much ) about someone getting marker on a nice shirt or something.
Just a few ideas!
The pessimist complains about the wind; the optimist expects it to change; the realist adjusts the sails.
William Arthur Ward