Bring a small frisbee – I started carrying an 8” disc I got with some company’s logo on it.  2.5 oz.  When my kids or Boy Scouts get a little cranky and say they can’t move any more I start tossing it to them.  They forget their feet hurt and start playing.
Also great for fanning campfires, a spare plate for eating, and makes a great organizer for glasses, flashlight, etc in my shelter at night.
