What can I do with these bangles. I don't wear anymore

Make a mobile, string them up as suncatchers, let the little girls play dress up.

You may have some treasures there. Worth some $$CASH$$. I'd be willing to take them off your hands. I sell a lot of stuff on EBAY.

They would make amazing Christmas tree ornaments. Try fitting on inside another to form a sphere. Glue or use fine wire to hold. If not of great value consider cutting and shaping for napkin rings. Check with you local high schools. Many schools help provide prom clothes and accessories for young girls tha may not have finances to buy and they have a "Let's Get Ready For Prom" get-together. These would be an amazing gift to the girls that may otherwise not have accessories.

I would try to sell them

Of course who else

Use them as tie backs for your curtains. You can hot glue a couple or more together to create a Bohemian feel to any room!

Try making some wind chimes.

Donate them to the women's shelter.

Make a mobile - Stick together to make a piece of Art -Stick them over a Jar or Tube or Plant Pot - Sell them - Make a Curtain by sticking together . Put them all on a Pole and Hang your Scarves through them etc........

Here's a post that might help http://decornotes.com/repurposing-your-bangles/