There are some free walking/running on leaves sounds to play with, I’ll see if I can mess around with it … gotta convert the video file to work for iMovie here at the office.
It doesn’t have to be super loud, but enough you can get a sense of movement and I would see if there is some kind of line to use like “hey” or “come one” or something that goes from soft to louder really quick just so we get SOME presence he is coming into the scene, even if it is quick.