We did use the scavenger hunt hike sheet I created, which you can print for free here. My son was pretty excited to use the sheet to find things and mark them off. So that was a good thing, but we didn't collect anything. I felt that nature should stay in nature. Maybe on future hikes I will feel different, but that day, I knew that nature needed to stay in the woods.
I think the best part is when we got chased by a dragon fly, everyone ran except my middle child, she just stood there looking at us like we were crazy, lol. Here are a few pictures of the neat things we saw during our hike.