The Solar Power Hat Fan($10) is cool, you just simply clamps on to your favorite hat (stiffer-type brims and baseball caps are recommended), then the solar panel get the solar energy to directly power the fan. A good idea! Share Via:Click to share on Google+ (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Tumblr (Opens in new window)Click to email this to a friend (Opens in new window)Like this:Like Loading...