bandana...head covering, towel, ground cloth for head
Bandanas are on the way, I forgot to include them in the list. They're going to be bright red.
For my kids, maybe not the best idea
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grease pencil so they can leave message on most any surface
That's a great idea. What might work better for them would be a small pack of crayons and a little notebook.
I originally decided against this but I'll reconsider.
At the ages they're at now, I'm going with no sharps.
section of orange survey tape
With all the brightly colored items already included, I don't think this would be worthwhile for them. In an adult's kit, or if I expect them to be moving around and marking their trail, sure, but they're trained to hug a tree and blow their whistles if they get lost.
Not a fan. I'd rather give them another AAA battery; the runtime of the Thrunite Ti on low is rated for 125 hours, and it's way sturdier than a chem light.