When my kids were young I had little survival kits for them when we were hiking and camping
I chose a pealess whistle so it would work when wet but many prefer the fox 40 whistle
Space blanket
Rain poncho in bright color
Family picture
Sak
Disposable camera however today I would replace this with a cheap $20 digital
gloves
Magnifying glass
Flashlight
Mini wineskin (for water but they thought they looked cool)
Granola bars
Pocket book on animals in our area
Fak
Hair doodles ( my daughters had long hair)