Not sure if they still make them, but we used to have a Black and Decker "snake fan" that we used on our stroller. It had a long flexible arm that you could wrap around the stroller frame and was easy to position so the child got a good breeze. The one fan we had that was actually a stroller fan was a clip on (which didn't like to stay put sometimes) and it kind of pointed wherever it wanted to and didn't adjust well.