I just received my Harmony catalog in the mail today and saw that they carry a solar powered hat fan-what a 'cool' idea. I'm going to get some ! They would be great at the parks and home too ! The web site is : www.gaiam.com/retail/product.asp?product_id=01-0343 . The item # is: 01-0343 and they are $10.00 each ($9.00 if you buy 2 or more).